#42 Checkboxes do not update properly when using postgresql database

[Matt Francis]

. The variable PGdb was initialized incorrectly in scheda.php:

File: scheda.php, line 291

Incorrect: $PGdb= ($db1['dbtype']=='postgres') ? "true":"false";

Verfied fix: $PGdb= ($db1['dbtype']=='postgres') ? true:false;