[renderer] Avoid infinite loop

If the entity didn't have a known model type, R_StoreEfrags would get
stuck in an infinite loop (fortunately, never actually happened. The
result of making it not call Sys_Error for unknown models)).

libs/video/renderer/r_efrag.c

@@ -236,10 +236,10 @@ R_StoreEfrags (const efrag_t *efrag)
 			case mod_sprite:
 			case mod_iqm:
 				EntQueue_AddEntity (r_ent_queue, ent, model->type);
-				efrag = efrag->leafnext;
 				break;
 
 			default:
 		}
+		efrag = efrag->leafnext;
 	}
 }