Merge "vp9_rd_pick_inter_mode_sb: fix uninitialized value"

vp9/encoder/vp9_rdopt.c

@@ -3298,7 +3298,7 @@ int64_t vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
     int compmode_cost = 0;
     int rate2 = 0, rate_y = 0, rate_uv = 0;
     int64_t distortion2 = 0, distortion_y = 0, distortion_uv = 0;
-    int skippable;
+    int skippable = 0;
     int64_t tx_cache[TX_MODES];
     int i;
     int this_skip2 = 0;