Brings down the number of snow.c warnings from 33 to 27 by putting parentheses around + or - inside shift.
Brings down the number of snow.c warnings from 33 to 27 by putting parentheses
around + or - inside shift.


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@7704 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg