===================================================================
RCS file: /cvs/mandoc/read.c,v
retrieving revision 1.8
retrieving revision 1.10
diff -u -p -r1.8 -r1.10
--- mandoc/read.c	2011/03/31 10:54:39	1.8
+++ mandoc/read.c	2011/04/03 10:11:25	1.10
@@ -1,4 +1,4 @@
-/*	$Id: read.c,v 1.8 2011/03/31 10:54:39 kristaps Exp $ */
+/*	$Id: read.c,v 1.10 2011/04/03 10:11:25 kristaps Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
@@ -662,6 +662,8 @@ mparse_alloc(enum mparset inttype, enum mandoclevel wl
 {
 	struct mparse	*curp;
 
+	assert(wlevel <= MANDOCLEVEL_FATAL);
+
 	curp = mandoc_calloc(1, sizeof(struct mparse));
 
 	curp->wlevel = wlevel;
@@ -709,8 +711,10 @@ void
 mparse_result(struct mparse *curp, struct mdoc **mdoc, struct man **man)
 {
 
-	*mdoc = curp->mdoc;
-	*man = curp->man;
+	if (mdoc)
+		*mdoc = curp->mdoc;
+	if (man)
+		*man = curp->man;
 }
 
 void