thanks to Alcat101 for finding and reporting this bug.

fixes the roctec suppressor's material_configs using its diffuse texture as a normal map bump, also fixes the _cc_thq.material_config where the normal map bump is missing a mipmap level.

TO INSTALL: drop the "Roctec Suppressor Normal Map Fix" folder inside your "mod_overrides" folder located at steam/steamapps/common/payday 2/assets/mod_overrides.