vsnprintf: Don't error out on end of format string.
vsnprintf: Don't error out on end of format string.

MikePopoloski/bx,bkaradzic/bx,pigpigyyy/bx,coconutxin/bx,septag/bx,attilaz/bx,pigpigyyy/bx,coconutxin/bx,MikePopoloski/bx,mmicko/bx,septag/bx,attilaz/bx,mmicko/bx,0-wiz-0/bx,fluffyfreak/bx,0-wiz-0/bx,bkaradzic/bx,fluffyfreak/bx