Fix UseSAK default value in kdesktop lock

This relates to Bug 1915

kdesktop/lock/main.cc

@@ -435,7 +435,7 @@ int main( int argc, char **argv )
         trinity_desktop_lock_delay_screensaver_start = KDesktopSettings::delaySaverStart();
         if (trinity_desktop_lock_use_system_modal_dialogs) {
 #ifdef BUILD_TSAK
-            trinity_desktop_lock_use_sak = tdmconfig->readBoolEntry("UseSAK", true) && KDesktopSettings::useTDESAK();
+            trinity_desktop_lock_use_sak = tdmconfig->readBoolEntry("UseSAK", false) && KDesktopSettings::useTDESAK();
 #else
             trinity_desktop_lock_use_sak = false;
 #endif