Fix cppcheck warnings

[mdblack98]

mplifiers/expert/expert.c:132:16: warning: Uninitialized variable: cmd [uninitvar]
amplifiers/gemini/gemini.c:160:14: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
amplifiers/gemini/gemini.c:171:14: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
amplifiers/gemini/gemini.c:172:14: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
amplifiers/gemini/gemini.c:174:14: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
amplifiers/gemini/gemini.c:190:37: warning: Either the condition '!amp' is redundant or there is possible null pointer dereference: amp. [nullPointerRedundantCheck]
rigs/anytone/anytone.c:248:9: warning: Either the condition 'p==NULL' is redundant or there is possible null pointer dereference: p. [nullPointerRedundantCheck]
rigs/anytone/anytone.c:279:5: warning: Either the condition 'rig==NULL' is redundant or there is possible null pointer dereference: rig. [nullPointerRedundantCheck]
rigs/anytone/anytone.c:367:5: warning: Either the condition 'rig==NULL' is redundant or there is possible null pointer dereference: rig. [nullPointerRedundantCheck]
rigs/anytone/anytone.c:385:5: warning: Either the condition 'rig==NULL' is redundant or there is possible null pointer dereference: rig. [nullPointerRedundantCheck]
rigs/anytone/anytone.c:439:5: warning: Either the condition 'rig==NULL' is redundant or there is possible null pointer dereference: rig. [nullPointerRedundantCheck]
rigs/anytone/anytone.c:222:5: warning: Either the condition 'rig==NULL' is redundant or there is possible null pointer dereference: rig. [nullPointerRedundantCheck]
rigs/aor/aor.c:274:9: warning: %d in format string (no. 1) requires 'int' but the argument type is 'unsigned int'. [invalidPrintfArgType_sint]
rigs/aor/aor.c:763:13: warning: %d in format string (no. 2) requires 'int' but the argument type is 'unsigned int'. [invalidPrintfArgType_sint]
rigs/aor/ar7030p.c:341:10: warning: Either the condition 'NULL!=rig->state.priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/aor/ar7030p.c:342:10: warning: Either the condition 'NULL!=rig->state.priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/aor/ar7030p.c:344:10: warning: Either the condition 'NULL!=rig->state.priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/codan/codan.c:220:13: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/dummy/aclog.c:532:17: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/dummy/aclog.c:585:5: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/dummy/aclog.c:611:14: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/dummy/aclog.c:296:20: warning: Uninitialized variable: xml [uninitvar]
rigs/dummy/dummy.c:467:15: warning: Either the condition 'priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/dummy/dummy.c:2186:5: warning: %d in format string (no. 10) requires 'int' but the argument type is 'unsigned int'. [invalidPrintfArgType_sint]
rigs/dummy/dummy.c:2220:5: warning: %d in format string (no. 10) requires 'int' but the argument type is 'unsigned int'. [invalidPrintfArgType_sint]
rigs/dummy/dummy.c:465:5: warning: Either the condition 'priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/dummy/netrigctl.c:815:29: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/dummy/quisk.c:756:29: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/dummy/rot_dummy.c:172:10: warning: Either the condition 'rot->state.priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/dummy/rot_dummy.c:173:10: warning: Either the condition 'rot->state.priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/dummy/rot_dummy.c:174:10: warning: Either the condition 'rot->state.priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/dummy/rot_dummy.c:175:10: warning: Either the condition 'rot->state.priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/dummy/tci1x.c:623:5: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/dummy/tci1x.c:636:5: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/dummy/tci1x.c:671:5: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/dummy/tci1x.c:823:9: warning: Either the condition '!rig' is redundant or there is possible null pointer dereference: rig. [nullPointerRedundantCheck]
rigs/elad/elad.c:3728:51: warning: Uninitialized variable: idbuf [uninitvar]
rigs/flexradio/dttsp.c:667:5: warning: Either the condition 'rig->state.priv' is redundant or there is possible null pointer dereference: priv. [nullPointerRedundantCheck]
rigs/gomspace/gs100.c:506:9: warning: sscanf() without field width limits can crash with huge input data. [invalidscanf]
rigs/gomspace/gs100.c:105:9: warning: Either the condition '!rig' is redundant or there is possible null pointer dereference: rig. [nullPointerRedundantCheck]
rigs/icom/frame.c:421:6: warning: Either the condition 'data_len!=NULL' is redundant or there is possible null pointer dereference: data_len. [nullPointerRedundantCheck]
rigs/icom/icom.c:739:9: warning: Either the condition '!rig' is redundant or there is possible null pointer dereference: rig. [nullPointerRedundantCheck]

[mdblack98]

No news is good news I guess