Limit source code to 80 chars, and declare functions return type and modifiers on a separate line. This allows to avoid very long lines, and all function names are aligned. (We do this on VLC, and I like it.)
lock_util.c did not include lock_util.h. This was catched by the gcc option -Wmissing-prototypes.
Rename foobar.ext to foo_bar.ext. <https://github.com/Genymobile/scrcpy/pull/226#discussion_r209454865>