Fix data alignment bug (the original purpose of the code is unclear, though).
patch by Marc Hoffman, mmh pleasantst com
Originally committed as revision 22847 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
cs_test.c:62: warning: return type defaults to 'int'
cs_test.c:64: warning: implicit declaration of function 'memalign'
Originally committed as revision 20036 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale