Fix warning on setting uniform for image
Fix warning on setting uniform for image

When selecting "Quad Overdraw (Pass)" from the texture viewer, I get this warning :

Log     - Got a Debug message from GL_DEBUG_SOURCE_API, type GL_DEBUG_TYPE_ERROR, ID 81, severity GL_DEBUG_SEVERITY_HIGH:
'GL_INVALID_OPERATION in glUniform1("overdrawImage"@12 is image, not uint)'

TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc,baldurk/renderdoc,baldurk/renderdoc,TurtleRockStudios/renderdoc_public,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,googlestadia/renderdoc,Zorro666/renderdoc,Zorro666/renderdoc,googlestadia/renderdoc,baldurk/renderdoc,googlestadia/renderdoc,Zorro666/renderdoc,baldurk/renderdoc,TurtleRockStudios/renderdoc_public