gallium/trace: remove useless NULL check from trace_screen_create()
gallium/trace: remove useless NULL check from trace_screen_create()

Currently every target makes sure that the screen is non-null prior to
using the debug (trace including) wrappers. If that no longer holds true
we want to know and fix this ASAP rather than silently bailing out.

Signed-off-by: Emil Velikov <4c996f2f093ddd0585a556460b4cc3ba555546ef@gmail.com>
Acked-by: Rob Clark <6f78cdb10adbe0a7fbbf4098125a51f401c77a5f@freedesktop.org>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler