Index: code/client/cl_scrn.c
===================================================================
--- code/client/cl_scrn.c	(revision 2041)
+++ code/client/cl_scrn.c	(working copy)
@@ -484,7 +484,7 @@
 
 	re.BeginFrame( stereoFrame );
 
-	uiFullscreen = VM_Call( uivm, UI_IS_FULLSCREEN );
+	uiFullscreen = (uivm && VM_Call( uivm, UI_IS_FULLSCREEN ));
 
 	// wide aspect ratio screens need to have the sides cleared
 	// unless they are displaying game renderings