Stop script processing upon mysql error. Based on a patch by Alexander Sornes.

include/query.php

@@ -12,6 +12,8 @@ function query_appdb($sQuery, $sComment="")
     {
         // The last argument makes sure we are really opening a new connection
         $hAppdbLink = mysql_connect(APPS_DBHOST, APPS_DBUSER, APPS_DBPASS, true);
+        if(!$hAppdbLink)
+          die("Database error, please try again soon.");          
         mysql_select_db(APPS_DB, $hAppdbLink);
     }