Force alignement for rpza and smc

Originally committed as revision 3262 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/utils.c

@@ -159,6 +159,16 @@ void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
             w_align=64;
             h_align=64;
         }
+    case PIX_FMT_RGB555:
+        if(s->codec_id == CODEC_ID_RPZA){
+            w_align=4;
+            h_align=4;
+        }
+    case PIX_FMT_PAL8:
+        if(s->codec_id == CODEC_ID_SMC){
+            w_align=4;
+            h_align=4;
+        }
         break;
     default:
         w_align= 1;