Continued work on the common save code.

jHexen now uses the same mechanisms for reading/writing thinkers as the other games.
jHexen now saves a player header like the other games.
Support for 1.8.6 jHexen save games is now working again other than a discrepancy between read/write of floormove_t which leads to failing a segment assert if they are present in a save.
Clean up.

doomsday/plugins/common/include/p_saveg.h

@@ -36,6 +36,7 @@ typedef enum lineclass_e {
     lc_normal,
     lc_xg1
 } lineclass_t;
+#endif
 
 typedef enum thinkclass_e {
     TC_NULL = -1,
@@ -46,6 +47,16 @@ typedef enum thinkclass_e {
     TC_DOOR,
     TC_FLOOR,
     TC_PLAT,
+#if __JHEXEN__
+    TC_INTERPRET_ACS,
+    TC_FLOOR_WAGGLE,
+    TC_LIGHT,
+    TC_PHASE,
+    TC_BUILD_PILLAR,
+    TC_ROTATE_POLY,
+    TC_MOVE_POLY,
+    TC_POLY_DOOR,
+#else
     TC_FLASH,
     TC_STROBE,
 # if __JDOOM__
@@ -57,28 +68,10 @@ typedef enum thinkclass_e {
 # else
     TC_GLOW,
 # endif
+#endif
     NUMTHINKERCLASSES
 } thinkerclass_t;
 
-#else
-typedef enum thinkclass_e {
-    TC_NULL,
-    TC_CEILING,
-    TC_DOOR,
-    TC_FLOOR,
-    TC_PLAT,
-    TC_INTERPRET_ACS,
-    TC_FLOOR_WAGGLE,
-    TC_LIGHT,
-    TC_PHASE,
-    TC_BUILD_PILLAR,
-    TC_ROTATE_POLY,
-    TC_MOVE_POLY,
-    TC_POLY_DOOR,
-    NUMTHINKERCLASSES
-} thinkerclass_t;
-#endif
-
 void            SV_Init(void);
 void            SV_SaveGameFile(int slot, char *str);
 int             SV_GetSaveDescription(char *filename, char *str);