Correct initialization to avoid compiler warning

Change-Id: Ibdcc7ad9ecbcf205883e74da950c1e9cbcdfdedd
diff --git a/examples/noise_model.c b/examples/noise_model.c
index 36e6bc4..9c304d9 100644
--- a/examples/noise_model.c
+++ b/examples/noise_model.c
@@ -182,7 +182,7 @@
   } else {
     die("--input-denoised file must be specified");
   }
-  aom_film_grain_table_t grain_table = { 0 };
+  aom_film_grain_table_t grain_table = { 0, 0 };
 
   int64_t prev_timestamp = 0;
   int frame_count = 0;