[Piglit] [PATCH] shader_runner: check for no GLSL program in setup_ubos()

[Eric Anholt]

Brian Paul <brianp at vmware.com> writes:

> If we're running an ARB_vertex/fragment_program test, there will be
> no GLSL shader program and 'prog' will be zero.  Return early to avoid
> generating an error from the GL_ACTIVE_UNIFORM_BLOCKS query.

Reviewed-by: Eric Anholt <eric at anholt.net>
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