File man-db-2.4.3-section.dif of Package man

--- src/man.c
+++ src/man.c	2006-06-13 14:01:19.000000000 +0000
@@ -1142,7 +1142,7 @@ static inline const char *is_section (co
 {
 	const char **vs;
 
-	for (vs = section_list; *vs; vs++) {
+	for (vs = section_list; vs && *vs; vs++) {
 		if (STREQ (*vs, name))
 			return name;
 		/* allow e.g. 3perl but disallow 8139too and libfoo */
@@ -2565,7 +2565,8 @@ static int compare_candidates (const str
 		 * section_list.
 		 */
 		const char **sp;
-		for (sp = section_list; *sp; ++sp) {
+
+		for (sp = section_list; sp && *sp; ++sp) {
 			if (!*(*sp + 1)) {
 				/* No extension */
 				if (!sec_left  && **sp == *(left->ext))
@@ -3209,7 +3210,7 @@ static int man (const char *name, int *f
 	} else {
 		const char **sp;
 
-		for (sp = section_list; *sp; sp++) {
+		for (sp = section_list; sp && *sp; sp++) {
 			char **mp;
 
 			for (mp = manpathlist; *mp; mp++)
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