Removed NOTREACHED and fixed ipp_t leak

Now correctly failing on unrecognized tag_types.

Keeping ipp_t objs wrapped in printing::ScopedIppPtr objs throughout
fuzzing.

Bug: chromium:936435
Test: Reproducible test case no longer fails.
Change-Id: I13fd72834fb971e5fc9fc28541c28b7a293a41d0
Reviewed-on: https://chromium-review.googlesource.com/c/1492572
Auto-Submit: Luum Habtemariam <luum@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: Luum Habtemariam <luum@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636477}
2 files changed