Update anigif.c to enable multiple gif players.
playgif now support true color by combining 3 gifs into 1.
For example: animation data\scenes\water.gif
If waterr.gif and waterg.gif and waterb.gif are all present, and video mode is 16 or 32bit, this feature is enabled automatically.
Authored by: utunnels 2011-09-04
Parent: [r3417]
Child: [r3419]
