avcodec/mm: don't fail if x offset exceeds frame width

libavcodec/mmvideo.c

@@ -161,7 +161,7 @@ static int mm_decode_inter(MmContext * s, int half_horiz, int half_vert)
             for(j=0; j<8; j++) {
                 int replace = (replace_array >> (7-j)) & 1;
                 if (x + half_horiz >= s->avctx->width)
-                    return AVERROR_INVALIDDATA;
+                    break;
                 if (replace) {
                     int color = bytestream2_get_byte(&data_ptr);
                     s->frame->data[0][y*s->frame->linesize[0] + x] = color;