Revert "VP9: Only zero counts when !frame_parallel_decoding_mode"

This reverts commit 380a5519cca999f54b17f37b709996a11f3204ea.

This causes an assertion failure in debug_check_frame_counts() which
probably isn't valid with this change; leaving the investigation for
later now.

Change-Id: Ieda5ca811ed2fa50a0cc6935919a8d10dca996e0

vp9/decoder/vp9_decodeframe.c

diff --git a/vp9/decoder/vp9_decodeframe.c b/vp9/decoder/vp9_decodeframe.c
index 89f8a16..f191663 100644
--- a/vp9/decoder/vp9_decodeframe.c
+++ b/vp9/decoder/vp9_decodeframe.c
@@ -1979,8 +1979,6 @@
   if (!cm->error_resilient_mode) {
     cm->refresh_frame_context = vpx_rb_read_bit(rb);
     cm->frame_parallel_decoding_mode = vpx_rb_read_bit(rb);
-    if (!cm->frame_parallel_decoding_mode)
-      vp9_zero(cm->counts);
   } else {
     cm->refresh_frame_context = 0;
     cm->frame_parallel_decoding_mode = 1;
@@ -2204,6 +2202,8 @@
     vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
                        "Uninitialized entropy context.");
 
+  vp9_zero(cm->counts);
+
   xd->corrupted = 0;
   new_fb->corrupted = read_compressed_header(pbi, data, first_partition_size);
   if (new_fb->corrupted)