Fix necessary for input partitions iface to match the RTP profile

These changes fixes a glitch between the RTP profile and the input
partitions interface. Since there's no way for the user to know the
actual number of partitions, the decoder have to read the
multi_token_paritition bits also when input partitions mode is
enabled.

Included are also a couple of fixes for issues with independent
partitions and uninitialized memory reads.

Change-Id: I6f93b15287d291169ed681898ed3fbcc5dc81837

vp8/decoder/threading.c

@@ -104,7 +104,7 @@ static void decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd, int mb_row, int m
     {
         vp8_reset_mb_tokens_context(xd);
     }
-    else
+    else if (!vp8dx_bool_error(xd->current_bc))
     {
         eobtotal = vp8_decode_mb_tokens(pbi, xd);
     }
@@ -169,7 +169,7 @@ static void decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd, int mb_row, int m
 #if CONFIG_ERROR_CONCEALMENT
     if (pbi->ec_active &&
         (mb_row * pbi->common.mb_cols + mb_col >= pbi->mvs_corrupt_from_mb ||
-        throw_residual))
+         throw_residual))
     {
         /* MB with corrupt residuals or corrupt mode/motion vectors.
          * Better to use the predictor as reconstruction.