Fix a bug

The line was accidently removed in 4dbad63a7.

Change-Id: Ic1e18f209cead95cecc684f952ae667271b58a97
diff --git a/vp9/encoder/vp9_onyx_if.c b/vp9/encoder/vp9_onyx_if.c
index 3f813a1..f52e680 100644
--- a/vp9/encoder/vp9_onyx_if.c
+++ b/vp9/encoder/vp9_onyx_if.c
@@ -3167,6 +3167,7 @@
 #endif
 
     // As this frame is a key frame the next defaults to an inter frame.
+    cm->frame_type = INTER_FRAME;
     vp9_clear_system_state();
     cpi->rc.frames_since_key = 0;
   } else {