Lock screen bypass

[xopr]

tested on 0.8.30

Lock screen can be bypassed
STEPS TO REPRODUCE

• enable screen lock and wait for the WiPhone to lock
• press Hangup (WIPHONE_KEY_END)

CURRENT RESULT

• device is unlocked

EXPECTED RESULT

• device should stay locked

NOTE
Also note that the unlock procedure is a bit fiddly: when pressing Ok and accidentally pressing an arrow key, the sequence is reset: This can be fixed by ignoring the arrow keys in GUI.cpp on line 661 changing:

          if (state.unlockButton1) {

into:

          if (state.unlockButton1 && event != WIPHONE_KEY_UP & event != WIPHONE_KEY_DOWN && event != WIPHONE_KEY_LEFT && event != WIPHONE_KEY_RIGHT ) {

[xopr]

I think this patch should fix it, but I'm currently unable to test it; it might also break the clock's input.