Actually allocate a properly sized temporary buffer for non-4:2:0 modes, even  though the decoder doesn't support them.
Actually allocate a properly sized temporary buffer for non-4:2:0 modes, even
 though the decoder doesn't support them.


git-svn-id: 8dbf393e6e9ab8d4979d29f9a341a98016792aa6@14716 0101bb08-14d6-0310-b084-bc0e0c8e3800

KTXSoftware/theora,Distrotech/libtheora,Distrotech/libtheora,KTXSoftware/theora,Distrotech/libtheora,KTXSoftware/theora,KTXSoftware/theora,KTXSoftware/theora,Distrotech/libtheora,Distrotech/libtheora