use new horizontal mmx scaler instead of old x86asm if mmx2 cant be used (FAST_BILINEAR only)
fixed overflow in init function ... using double precission fp now :)
using C scaler for the last 1-2 lines if there is a chance to write over the end of the dst array


git-svn-id: file:///var/local/repositories/mplayer/trunk/postproc@3353 b3059339-0415-0410-9bf9-f77b7e298cf2