skia2/tests/sksl/errors/Ossfuzz31469.glsl

### Compilation failed:

error: 1: function 'n' can exit without returning a value
error: 1: function 'n' exits without returning a value
2 errors
Fix fuzzer-discovered error with inlining. In http://review.skia.org/375776, an optimization was added to the Inliner, causing it to skip generation of unnecessary temporary variables. The fuzzer immediately discovered a flaw in this logic: the "unnecessary" variable was actually used in the rare case that a function failed to actually return a value. The inliner didn't detect this case. Of course, this isn't a valid program either, so now we report the error and cleanly fail. Change-Id: I1f201cfd33f45cace3be93765a4e214e43a46e69 Bug: oss-fuzz:31469, oss-fuzz:31525 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/377101 Reviewed-by: Ethan Nicholas <ethannicholas@google.com> Commit-Queue: Ethan Nicholas <ethannicholas@google.com> Auto-Submit: John Stiles <johnstiles@google.com> 2021-03-01 15:08:08 +00:00			`### Compilation failed:`

			`error: 1: function 'n' can exit without returning a value`
			`error: 1: function 'n' exits without returning a value`
			`2 errors`