Trying to reduce memory footprint.

src/ui/menu.c

@@ -8,8 +8,6 @@
 #include "menu.h"
 
 void menuInit(menu_t *menu) {
-  int32_t i;
-
   menu->itemCount = 0;
   menu->selected = 0;
   menu->cursorX = 0;
@@ -19,7 +17,7 @@ void menuInit(menu_t *menu) {
 void menuUpdate(menu_t *menu, engine_t *engine) {
   menuitem_t *current;
   menuitem_t *item;
-  int32_t x, y, i, j;
+  uint8_t x, y, i, j;
 
   current = menu->items + menu->selected;