Removed unnecessary frame type checks

ref_frame is set to INTRA_FRAME for keyframes.  The B_PRED
mode is only used in intra frames.

Change-Id: I9bac8bec7c736300d47994f3cb570329edf11ec0

vp8/decoder/decodframe.c

diff --git a/vp8/decoder/decodframe.c b/vp8/decoder/decodframe.c
index e9655fb..9598508 100644
--- a/vp8/decoder/decodframe.c
+++ b/vp8/decoder/decodframe.c
@@ -111,9 +111,8 @@
  */
 static void skip_recon_mb(VP8D_COMP *pbi, MACROBLOCKD *xd)
 {
-    if (xd->frame_type == KEY_FRAME  ||  xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
+    if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
     {
-
         vp8_build_intra_predictors_mbuv_s(xd);
         RECON_INVOKE(&pbi->common.rtcd.recon,
                      build_intra_predictors_mby_s)(xd);
@@ -207,7 +206,7 @@
         mb_init_dequantizer(pbi, xd);
 
     /* do prediction */
-    if (xd->frame_type == KEY_FRAME  ||  xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
+    if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME)
     {
         vp8_build_intra_predictors_mbuv(xd);
 
@@ -254,7 +253,7 @@
                          xd->predictor, xd->dst.y_buffer,
                          xd->dst.y_stride, xd->eobs, xd->block[24].diff);
     }
-    else if ((xd->frame_type == KEY_FRAME  ||  xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) && xd->mode_info_context->mbmi.mode == B_PRED)
+    else if (xd->mode_info_context->mbmi.mode == B_PRED)
     {
         for (i = 0; i < 16; i++)
         {