Fix some warnings

[GustavoLCR]

No description provided.

[codecov-io]

Codecov Report

Merging #15549 into master will increase coverage by <.01%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master   #15549      +/-   ##
==========================================
+ Coverage   38.86%   38.87%   +<.01%     
==========================================
  Files         974      974              
  Lines      320263   320262       -1     
==========================================
+ Hits       124473   124489      +16     
+ Misses     195790   195773      -17

Impacted Files	Coverage Δ
libr/magic/magic.c	33.57% <ø> (ø)	⬆️
libr/cons/cons.c	52.95% <ø> (ø)	⬆️
libr/util/sys.c	53.46% <ø> (+0.23%)	⬆️
libr/io/undo.c	54.18% <ø> (-0.26%)	⬇️
libr/util/thread.c	44.82% <ø> (ø)	⬆️
libr/core/cconfig.c	88.55% <ø> (ø)	⬆️
libr/cons/dietline.c	8.66% <ø> (ø)	⬆️
libr/core/cmd.c	44.57% <ø> (ø)	⬆️
libr/util/lib.c	25.12% <ø> (ø)	⬆️
libr/main/radare2.c	46.35% <0%> (ø)	⬆️
... and 14 more

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