Fix a compile warning with EncodeFrameParams

Change-Id: Ic06d972cbfb748433f1fda4e678666f880edfb94
diff --git a/av1/encoder/encode_strategy.c b/av1/encoder/encode_strategy.c
index 0d2286c..6d5fa6e 100644
--- a/av1/encoder/encode_strategy.c
+++ b/av1/encoder/encode_strategy.c
@@ -132,7 +132,7 @@
 
 int av1_encode_strategy(AV1_COMP *const cpi, size_t *const size,
                         uint8_t *const dest, unsigned int *frame_flags) {
-  EncodeFrameParams frame_params = { 0 };
+  EncodeFrameParams frame_params = { 0, 0, 0 };
   EncodeFrameResults frame_results = { 0 };
 
   frame_params.frame_flags = frame_flags;