tree 0d0cc968a9f896071faf90e6b9a8f91c55f30142
parent db36c244e24204b9c97c6f784bb1dc63445e4d4f
author Tom Sepez <tsepez@chromium.org> 1543440470 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1543440470 +0000

Avoid overflow when rounding 2147483616 to a 32-bit boundary.

Looks like the optimizer didn't fold my N - 1, so currently we add
N and overflow, then subtract 1 and underflow, in this one legitimate
case. Caller is responsible otherwise.

Bug: chromium:909718
Change-Id: Idec62ce25ed70897a2d3294a27a146f83c6677da
Reviewed-on: https://pdfium-review.googlesource.com/c/45873
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>