glamor: Check large pixmap users in glamor_largepixmap.c

This enables the assertion that all users of the large pixmap member
are restricted to pixmaps which are actually large.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>

glamor/glamor_largepixmap.c

@@ -4,9 +4,7 @@
 
 static inline glamor_pixmap_private_large_t *
 __glamor_large(glamor_pixmap_private *pixmap_priv) {
-#if 0
     assert(pixmap_priv->type == GLAMOR_TEXTURE_LARGE);
-#endif
     return &pixmap_priv->large;
 }