Add Exception if MB support is not available in PHP

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@3813 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

dblayeroo.php

@@ -72,6 +72,9 @@ class dblayeroo
                                $driver_options=null)
   /* {{{ */
   {
+    if (! function_exists ("mb_strlen"))
+      throw new \Exception ("PHP don't have the MB Support. Please add it !",
+        500);
     $driver = @explode (":", $dsn);
     if (! isset ($driver[0]))
       $this->DBException (dgettext ("domframework", "No valid DSN provided"));