Fix MaterialItem not entirely uninitializing

was causing an exception when a MaterialItem had a script on it

source/game/items/StarMaterialItem.cpp

@@ -72,6 +72,7 @@ void MaterialItem::init(ToolUserEntity* owner, ToolHand hand) {
 }
 
 void MaterialItem::uninit() {
+  FireableItem::uninit();
   m_lastAimPosition.reset();
 }