mesa/main/ff_frag: Store nr_enabled_units only once.
mesa/main/ff_frag: Store nr_enabled_units only once.

Signed-off-by: Gustaw Smolarczyk <c5b012c207a4d1772b2d0494e7632306fbe4aa93@gmail.com>
Signed-off-by: Marek Olšák <8c7344a1abdb103e79ecfd488098373070c3c70e@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler