Fixes an assert triggered in jitter_buffer_test and disables deblocking.

When deblocking is enabled the first frames can include uninitialized
memory. Disabling for now.

BUG=
TEST=

Review URL: http://webrtc-codereview.appspot.com/320010

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1181 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/video_coding/main/source/session_info.cc

@@ -637,7 +637,6 @@ int VCMSessionInfo::PrepareForDecode(uint8_t* frame_buffer) {
   if (real_data_bytes == 0) {
     // Drop the frame since all it contains are zeros.
     length = 0;
-    packets_.clear();
   }
   return length;
 }