Also reset has_detail when resetting error_code.

When we reset cm->error.error_code to AOM_CODEC_OK at the beginning of
av1_receive_compressed_data(), we should also reset cm->error.has_detail
to 0. Otherwise, we may use the stale error message in cm->error.detail
inadvertently.

Change-Id: I36a7229c65fd2251137935ae5e070d89fb02c854
diff --git a/av1/decoder/decoder.c b/av1/decoder/decoder.c
index 6d88a64..c6c439f 100644
--- a/av1/decoder/decoder.c
+++ b/av1/decoder/decoder.c
@@ -448,6 +448,7 @@
   RefCntBuffer *volatile const frame_bufs = cm->buffer_pool->frame_bufs;
   const uint8_t *source = *psource;
   cm->error.error_code = AOM_CODEC_OK;
+  cm->error.has_detail = 0;
 
   if (size == 0) {
     // This is used to signal that we are missing frames.