Enhance database error reporting

(cherry picked from commit ba10527d0e)

kbarcode/sqltables.cpp

@@ -269,9 +269,10 @@ bool SqlTables::newTables( const TQString & username, const TQString & password,
         TQSqlDatabase::removeDatabase( database );
         KMessageBox::information( 0, i18n("Created table ")+database+i18n(" successfully!") );
     } else {
+        TQSqlError dbError = dbase->lastError();
         dbase->close();
         TQSqlDatabase::removeDatabase(drivers[driver]->initdb( database ));
-        KMessageBox::sorry( 0, i18n("Can't connect to database.") );
+        KMessageBox::sorry(0, i18n("Can't connect to database.") + "\n" + dbError.driverText() + "\n" + dbError.databaseText());
         return false;
     }