fixed skslc's nested conditional break detection

skslc produces an error when a static switch contains a conditional
break statement. Prior to this change, it was generating a false
positive when there was a break statement in a nested (non-conditional)
block.

Bug: skia:
Change-Id: I17cf42528ac975ab9d644ffb9b4f6f1f952f3887
Reviewed-on: https://skia-review.googlesource.com/148993
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
1 file changed