Invalid database configuration results in fatal error

Created by Daniel, 26th Mar 2012. (originally Lighthouse ticket #33):

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An invalid database configuration can sometimes result in a failure to connect to the SQLite database without an error. As no error is caught by CakePhP, PhP itself throws a fatal error on line 221 as no $connection object exists. This bug fix forces the _execute() function to check that the database is in fact connected - if not, CakePhP gracefully throws a helpful error message to the user.

Reported here: http://stackoverflow.com/questions/4779007/cakephp-and-sqlite-fatal-error-call-to-a-member-function-query-on-a-non-obje, here: http://stackoverflow.com/questions/7107996/fatal-error-call-to-a-member-function-query-on-a-non-object-in-var-www-likes, and here: http://stackoverflow.com/questions/7572091/error-while-trying-to-connect-to-sqlite3-database-from-cakephp

To reproduce: set $config['connect'] to an invalid value.

I have submitted a bugfix here: dm-coding@1b7ca41

All the best,

Daniel

[AD7six]

Closing as the PR #31 coverts this