Fix operator precedence warnings.

Bug 15387371

Change-Id: I665ee641932d34abb28f150ba036bbbed9fa1431
Reviewed-on: https://swiftshader-review.googlesource.com/4503
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>
2 files changed