SDL_syswm.h comma at end of enumerator list

Hi,

could someone with commit access please fix this warning:

/usr/include/SDL2/SDL_syswm.h:113: warning: comma at end of enumerator
list [-Wpedantic]
SDL_SYSWM_MIR,
^

Before we go into a discussion whether this is a warning that should be
fixed or not, please note that the same warning in other places of the
SDL code has been reported before and fixed:

http://lists.libsdl.org/pipermail/commits-libsdl.org/2012-December/006129.html

Thanks

could someone with commit access please fix this warning:

Done: https://hg.libsdl.org/SDL/rev/8c0fafc6b438

Thanks!

–ryan.