tree 9a109a0a62364b5783165890a7b75ee34535a2a2
parent f447f8cac2bcfd3a31916c4545b51240591425f7
author Wan-Teh Chang <wtc@google.com> 1540505534 -0700
committer Wan-Teh Chang <wtc@google.com> 1540599822 +0000

Assert the ref_count is valid in ref_cnt_fb().

This is similar to the assertion I added to decrease_ref_count() in
commit d230388e48433458a0e93d380c7b951854c9f9ff:
https://aomedia-review.googlesource.com/c/aom/+/72161

BUG=aomedia:2179

Change-Id: I697478086a672261292ce3a03c9973e1fdd56e5a