Missing threshold case for disable split.

In relation to change:
Refactor inter mode rate-distortion search
 Ie6bdfa0a370148dd60bd800961077f7e97e67dd4

sf->thresh_mult_sub8x8[THR_INTRA] = INT_MAX missing;

Change-Id: Ia86b68a5073368a3e2ca124a27b632243b525c8b

vp9/encoder/vp9_onyx_if.c

diff --git a/vp9/encoder/vp9_onyx_if.c b/vp9/encoder/vp9_onyx_if.c
index 03a90ff..d2e46ef 100644
--- a/vp9/encoder/vp9_onyx_if.c
+++ b/vp9/encoder/vp9_onyx_if.c
@@ -701,6 +701,7 @@
     sf->thresh_mult_sub8x8[THR_ALTR] = INT_MAX;
     sf->thresh_mult_sub8x8[THR_COMP_LA] = INT_MAX;
     sf->thresh_mult_sub8x8[THR_COMP_GA] = INT_MAX;
+    sf->thresh_mult_sub8x8[THR_INTRA] = INT_MAX;
   }
 }