Fix some interger overflow errors

Change-Id: I7e44bd952f28ce9925e8bdf6ee8ca2bb13de1b49

vp9/encoder/vp9_mcomp.c

diff --git a/vp9/encoder/vp9_mcomp.c b/vp9/encoder/vp9_mcomp.c
index 4004dd3..607941c 100644
--- a/vp9/encoder/vp9_mcomp.c
+++ b/vp9/encoder/vp9_mcomp.c
@@ -153,10 +153,10 @@
  */
 
 /* estimated cost of a motion vector (r,c) */
-#define MVC(r, c)                                       \
-    (mvcost ?                                           \
-     ((mvjcost[((r) != rr) * 2 + ((c) != rc)] +         \
-       mvcost[0][((r) - rr)] + mvcost[1][((c) - rc)]) * \
+#define MVC(r, c)                                              \
+    (mvcost ?                                                  \
+     ((unsigned)(mvjcost[((r) != rr) * 2 + ((c) != rc)] +      \
+       mvcost[0][((r) - rr)] + mvcost[1][((c) - rc)]) *        \
       error_per_bit + 4096) >> 13 : 0)
 
 
@@ -849,9 +849,9 @@
       cost_list[i + 1] = fn_ptr->vf(what->buf, what->stride,
                                     get_buf_from_mv(in_what, &this_mv),
                                     in_what->stride, &sse) +
-          // mvsad_err_cost(x, &this_mv, &fcenter_mv, sadpb);
-          mv_err_cost(&this_mv, &fcenter_mv, x->nmvjointcost, x->mvcost,
-                      x->errorperbit);
+                                    mv_err_cost(&this_mv, &fcenter_mv,
+                                                x->nmvjointcost, x->mvcost,
+                                                x->errorperbit);
     }
   } else {
     for (i = 0; i < 4; i++) {
@@ -863,9 +863,9 @@
         cost_list[i + 1] = fn_ptr->vf(what->buf, what->stride,
                                       get_buf_from_mv(in_what, &this_mv),
                                       in_what->stride, &sse) +
-            // mvsad_err_cost(x, &this_mv, &fcenter_mv, sadpb);
-            mv_err_cost(&this_mv, &fcenter_mv, x->nmvjointcost, x->mvcost,
-                        x->errorperbit);
+                                      mv_err_cost(&this_mv, &fcenter_mv,
+                                                  x->nmvjointcost, x->mvcost,
+                                                  x->errorperbit);
     }
   }
 }

vp9/encoder/x86/vp9_diamond_search_sad_avx.c

diff --git a/vp9/encoder/x86/vp9_diamond_search_sad_avx.c b/vp9/encoder/x86/vp9_diamond_search_sad_avx.c
index 2ed3f1a..7b28e13 100644
--- a/vp9/encoder/x86/vp9_diamond_search_sad_avx.c
+++ b/vp9/encoder/x86/vp9_diamond_search_sad_avx.c
@@ -50,8 +50,9 @@
                           int error_per_bit) {
   const int_mv diff = pack_int_mv(mv.as_mv.row - ref->row,
                                   mv.as_mv.col - ref->col);
-  return ROUND_POWER_OF_TWO(mv_cost(diff, x->nmvjointsadcost,
-                                    x->nmvsadcost) * error_per_bit, 8);
+  return ROUND_POWER_OF_TWO((unsigned)mv_cost(diff, x->nmvjointsadcost,
+                                              x->nmvsadcost) *
+                                              error_per_bit, 8);
 }
 
 /*****************************************************************************