fixed creole DSN when using an empty password with a colon before like in mysql://root:@localhost
fixed creole DSN when using an empty password with a colon before like in mysql://root:@localhost

git-svn-id: 2c1cedb23b8580241ed92ba4ad7c1ac34af28f97@6006 ee427ae8-e902-0410-961c-c3ed070cd9f9

Symfony-Plugins/sfPropel14Plugin