pidgin/pidgin

Bump C standard to C99 for XMPP and fix warnings

18 months ago, Elliott Sales de Andrade
025eee9e6f1d
Bump C standard to C99 for XMPP and fix warnings

Testing Done:
Touch all XMPP source files, recompiled and saw no new warnings.

Reviewed at https://reviews.imfreedom.org/r/2125/
Title: Contributing
Slug: contributing
Contributing to libpurple is a bit different than other applications, but we
have documented everything you need to know in the official
[contributors guide](https://docs.imfreedom.org/contributors-guide/).