ivi_common: do not call MC for intra frames when dc_transform is unset

CC:libav-stable@libav.org

libavcodec/ivi_common.c

@@ -527,7 +527,8 @@ static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band, IVITile *tile
                 /* block not coded */
                 /* for intra blocks apply the dc slant transform */
                 /* for inter - perform the motion compensation without delta */
-                if (is_intra && band->dc_transform) {
+                if (is_intra) {
+                    if (band->dc_transform)
                         band->dc_transform(&prev_dc, band->buf + buf_offs,
                                            band->pitch, blk_size);
                 } else