Unbreak the non-var_tx build.

Change-Id: I76cc3d88122de42f035fbf6508bdf3fd7c995012

vp10/encoder/encodemb.c

@@ -432,10 +432,10 @@ static void encode_block(int plane, int block, int blk_row, int blk_col,
 //    return;
 //  }
 
+#if CONFIG_VAR_TX
   // Assert not magic number (uninitialised).
   assert(x->blk_skip[plane][(blk_row << bwl) + blk_col] != 234);
 
-#if CONFIG_VAR_TX
   if (!x->skip_recode &&
       x->blk_skip[plane][(blk_row << bwl) + blk_col] == 0) {
 #else