fix extended matching when rule is missing (ITS#3216)

CHANGES

@@ -3,6 +3,7 @@ OpenLDAP 2.1 Change Log
 OpenLDAP 2.1.31 Engineering
 	Fixed slapd extended match memory leak (ITS#3146)
 	Fixed slapd abandon/cancel pending bug (ITS#3160)
+	Fixed libldap matchedValues parsing bug (ITS#3216)
 
 OpenLDAP 2.1.30 Release
 	Fixed slapd userdb checkpass bug (ITS#3048)

libraries/libldap/filter.c

@@ -1080,7 +1080,6 @@ put_simple_vrFilter(
 
 		{
 			char *rule = strchr( str, ':' );
-			*rule++ = '\0';
 
 			if( rule == NULL ) {
 				/* must have attribute */