database exists function in dbutil
diff --git a/system/database/DB_utility.php b/system/database/DB_utility.php
index 94e7a0b..af62dcf 100644
--- a/system/database/DB_utility.php
+++ b/system/database/DB_utility.php
@@ -75,6 +75,20 @@
// --------------------------------------------------------------------
/**
+ * Determine if a particular database exists
+ *
+ * @access public
+ * @param string
+ * @return boolean
+ */
+ function database_exists($database_name)
+ {
+ return ( ! in_array($database_name, $this->list_databases())) ? FALSE : TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
* Optimize Table
*
* @access public