Replacing is_inter_mode with is_inter_block.

It should be only a check based on the block type (inter vs intra), not on
the mode value.

Change-Id: I0378cb4ba7c9a1631c1e870a537187b8650fa30a

vp9/common/vp9_pred_common.c

diff --git a/vp9/common/vp9_pred_common.c b/vp9/common/vp9_pred_common.c
index be42c56..57ca5c5 100644
--- a/vp9/common/vp9_pred_common.c
+++ b/vp9/common/vp9_pred_common.c
@@ -35,14 +35,14 @@
   // left of the entries correpsonding to real macroblocks.
   // The prediction flags in these dummy entries are initialised to 0.
   // left
-  const int left_mv_pred = left_in_image ? is_inter_mode(left_mi->mbmi.mode)
+  const int left_mv_pred = left_in_image ? is_inter_block(&left_mi->mbmi)
                                          : 0;
   const int left_interp = left_in_image && left_mv_pred
                               ? left_mi->mbmi.interp_filter
                               : SWITCHABLE_FILTERS;
 
   // above
-  const int above_mv_pred = above_in_image ? is_inter_mode(above_mi->mbmi.mode)
+  const int above_mv_pred = above_in_image ? is_inter_block(&above_mi->mbmi)
                                            : 0;
   const int above_interp = above_in_image && above_mv_pred
                                ? above_mi->mbmi.interp_filter