Merge commit 'a1926a29'

* commit 'a1926a29':
  hevc: avoid invalid shifts of negative values
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

libavcodec/hevc.c

@@ -1331,7 +1331,7 @@ static void luma_mc_uni(HEVCContext *s, uint8_t *dst, ptrdiff_t dststride,
 
     x_off += mv->x >> 2;
     y_off += mv->y >> 2;
-    src   += y_off * srcstride + x_off * (1 << s->ps.sps->pixel_shift);
+    src   += y_off * srcstride + (x_off * (1 << s->ps.sps->pixel_shift));
 
     if (x_off < QPEL_EXTRA_BEFORE || y_off < QPEL_EXTRA_AFTER ||
         x_off >= pic_width - block_w - QPEL_EXTRA_AFTER ||
@@ -1486,7 +1486,7 @@ static void chroma_mc_uni(HEVCContext *s, uint8_t *dst0,
 
     x_off += mv->x >> (2 + hshift);
     y_off += mv->y >> (2 + vshift);
-    src0  += y_off * srcstride + x_off * (1 << s->ps.sps->pixel_shift);
+    src0  += y_off * srcstride + (x_off * (1 << s->ps.sps->pixel_shift));
 
     if (x_off < EPEL_EXTRA_BEFORE || y_off < EPEL_EXTRA_AFTER ||
         x_off >= pic_width - block_w - EPEL_EXTRA_AFTER ||