main: set_tex_parameterf now handles errors according to the OpenGL 4.5 Specification.

main: set_tex_parameterf now handles errors according to the OpenGL 4.5 Specification.

Beginning in the OpenGL 4.3 core specification, certain error handling has
changed.  One example shown here is that INVALID_ENUM is thrown instead of
INVALID_OPERATION when a user attempts to set sampler parameters for a
multisample target.

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>