OBJ_LOADER_DEMO: Specify a sampler for text rendering
OBJ_LOADER_DEMO: Specify a sampler for text rendering

Otherwise, the class will use whatever sampler is already bound. (Or if there
isn't one bound, the driver will complain)

RichieSams/thehalflingproject,RichieSams/thehalflingproject,RichieSams/thehalflingproject