user_is_realname_valid function does not exist in MantisBT 1.3.x

Author: SL-Gundam

core/mail_api.php

@@ -1258,7 +1258,7 @@ private function prepare_realname( $p_user_info, $p_username )
 			$t_realname = utf8_substr( $t_realname, 0, DB_FIELD_SIZE_REALNAME );
 		}
 
-		if ( user_is_realname_valid( $t_realname ) && user_is_realname_unique( $p_username, $t_realname ) )
+		if ( ( !function_exists( 'user_is_realname_valid' ) || user_is_realname_valid( $t_realname ) ) && user_is_realname_unique( $p_username, $t_realname ) )
 		{
 			return( $t_realname );
 		}

doc/CHANGELOG.txt

@@ -3,6 +3,7 @@ Jun 2016 - EmailReporting-0.9.2-DEV
 	- Fixed collation check issue with MantisBT 1.3.x
 	- Modified the user option list to also check user accessible projects
 	- Show missing user id behind the error in the user option list
+	- user_is_realname_valid function does not exist in MantisBT 1.3.x
 
 May 2016 - EmailReporting-0.9.1
 	- Modified error message incase no valid reporter could be found