pidgin/pidgin

Bump C standard to C99 for libpurple files and fix warnings

17 months ago, Elliott Sales de Andrade
c8a4853205e3
Bump C standard to C99 for libpurple files and fix warnings

Testing Done:
Touched all source files and compiled; saw no new warnings.

Reviewed at https://reviews.imfreedom.org/r/2122/
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