vYCoeffsBank and vCCoeffsBank are allocated and initialized using incorrect

sizes based on the image width instead of height.
patch by Alan Curry, pacman at world dot std dot com

Originally committed as revision 17558 to svn://svn.mplayerhq.hu/mplayer/trunk/postproc

postproc/yuv2rgb_altivec.c

@@ -788,17 +788,17 @@ altivec_yuv2packedX (SwsContext *c,
 
   vector signed short *YCoeffs, *CCoeffs;
 
-  vYCoeffsBank = malloc (sizeof (vector signed short)*lumFilterSize*dstW);
+  vYCoeffsBank = malloc (sizeof (vector signed short)*lumFilterSize*c->dstH);
-  vCCoeffsBank = malloc (sizeof (vector signed short)*chrFilterSize*dstW);
+  vCCoeffsBank = malloc (sizeof (vector signed short)*chrFilterSize*c->dstH);
 
-  for (i=0;i<lumFilterSize*dstW;i++) {
+  for (i=0;i<lumFilterSize*c->dstH;i++) {
     tmp = c->vLumFilter[i];
     p = &vYCoeffsBank[i];
     for (j=0;j<8;j++)
       p[j] = tmp;
   }
 
-  for (i=0;i<chrFilterSize*dstW;i++) {
+  for (i=0;i<chrFilterSize*c->dstH;i++) {
     tmp = c->vChrFilter[i];
     p = &vCCoeffsBank[i];
     for (j=0;j<8;j++)