egl: handle NULL loaderPrivate in dri_is_thread_safe
This can happen when a context is created from loader_dri3_blit_context_get and glthread is enabled.
Closes: #7960 (closed)
Closes: #7949 (closed)
Cc: mesa-stable
This can happen when a context is created from loader_dri3_blit_context_get and glthread is enabled.
Closes: #7960 (closed)
Closes: #7949 (closed)
Cc: mesa-stable