$OpenBSD: patch-pine_mailview_c,v 1.4 2005/11/23 13:44:25 jakob Exp $
--- pine/mailview.c.orig	Tue Sep 20 20:26:20 2005
+++ pine/mailview.c	Wed Nov 23 14:26:30 2005
@@ -4392,6 +4392,9 @@ url_hilite(linenum, line, ins, local)
     char	   buf[256], color[256];
     HANDLE_S	  *h;
 
+    if (line == NULL)
+	return (-1);
+
     for(lp = line; ; lp = up + n){
 	/* scan for all of them so we can choose the first */
 	if(F_ON(F_VIEW_SEL_URL,ps_global))
@@ -4467,6 +4470,9 @@ url_hilite_hdr(linenum, line, ins, local
     static int     check_for_urls = 0;
     register char *lp;
 
+    if (line == NULL)
+	return (-1);
+
     if(isspace((unsigned char)*line))	/* continuation, check or not 
 					   depending on last line */
       lp = line;
@@ -4510,7 +4516,7 @@ url_hilite_abook(linenum, line, ins, loc
 {
     register char *lp;
 
-    if((lp = strchr(line, ':')) &&
+    if(line && (lp = strchr(line, ':')) &&
        !strncmp(line, AB_COMMENT_STR, strlen(AB_COMMENT_STR)))
       (void) url_hilite(linenum, lp + 1, ins, local);