Prevent division-by-zero in VCMFecMethod.

webrtc/modules/video_coding/media_opt_util.cc

Index: webrtc/modules/video_coding/media_opt_util.cc
diff --git a/webrtc/modules/video_coding/media_opt_util.cc b/webrtc/modules/video_coding/media_opt_util.cc
index d57e9c8dd28120e1d1765a31163440efa3d6bf93..69cf757f2b45adeb8804e2c9b726ed0f0e61d0c2 100644
--- a/webrtc/modules/video_coding/media_opt_util.cc
+++ b/webrtc/modules/video_coding/media_opt_util.cc
@@ -434,6 +434,8 @@ int VCMFecMethod::BitsPerFrame(const VCMProtectionParameters* parameters) {
   // TODO(mikhal): Update factor following testing.
   float adjustmentFactor = 1;
 
+  if (frameRate < 1.0f)
+    frameRate = 1.0f;
   // Average bits per frame (units of kbits)
   return static_cast<int>(adjustmentFactor * bitRate / frameRate);
 }