Allow division by zero in fill_triangle_3's perspective divide
Allow division by zero in fill_triangle_3's perspective divide

The following code handles this case cleanly: The bounds don't fit in
fixed-point, so we fall back to treating the triangle as a path. The
path code drops the primitive for being non-finite.

Bug: oss-fuzz:48319
Change-Id: Icca7a2c8b3b8d3a67931cc6736a2fb216fb831d9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/556608
Reviewed-by: Herb Derby <9e12a3d2bbf73546e47cc9958f6ba8f3215b7eaf@google.com>
Commit-Queue: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>

google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia