Don't init `Layer.repeat_first_press` to true yet.

For some odd reason, initializing it there crashes the firmware early on. Until
I figure out how to fix this, lets default to an implicit false.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>

src/layers.cpp

@@ -6,7 +6,7 @@ static uint32_t LayerState;
 uint8_t Layer_::highestLayer;
 Key Layer_::keyMap[ROWS][COLS];
 Key(*Layer_::getKey)(uint8_t layer, byte row, byte col) = Layer.getKeyFromPROGMEM;
-bool Layer_::repeat_first_press = true;
+bool Layer_::repeat_first_press;
 
 static void handleKeymapKeyswitchEvent(Key keymapEntry, uint8_t keyState) {
   if (keymapEntry.keyCode >= MOMENTARY_OFFSET) {