The test for whether 0-width or 0-height is not given was doing

    width != 0 || height != 0

which mistakenly used || instead of &&.

Bug: angleproject:2910
Change-Id: Iaa41edffcfe1f8553e8fbefb9bc3b12a7f33a5a6
Reviewed-on: https://chromium-review.googlesource.com/c/1316028Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>