Cosmetic change of GetBitrateInKbps

Change-Id: Id4b852cdfba0f6fa1e12a05e2617df0de395be9d
diff --git a/test/simple_encode_test.cc b/test/simple_encode_test.cc
index 82d0963..8caf8bf 100644
--- a/test/simple_encode_test.cc
+++ b/test/simple_encode_test.cc
@@ -19,7 +19,7 @@
 double GetBitrateInKbps(size_t bit_size, int num_frames, int frame_rate_num,
                         int frame_rate_den) {
   return static_cast<double>(bit_size) / num_frames * frame_rate_num /
-         frame_rate_den / 1000.;
+         frame_rate_den / 1000.0;
 }
 
 TEST(SimpleEncode, ComputeFirstPassStats) {