This fixes a pedantic warning about 'patchSite' being an unused variable.

Change-Id: I2540461fb3da98cebf94350f731fe452e9768b8f
Reviewed-on: https://swiftshader-review.googlesource.com/9610Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Corentin Wallez <cwallez@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>