CheckBasicStyle: Check number of empty lines between functions (#4267)

Add check for number of empty lines between functions and fix the corresponding failures

src/Inventory.cpp

@@ -101,6 +101,8 @@ int cInventory::HowManyCanFit(const cItem & a_ItemStack, int a_BeginSlotNum, int
 
 
 
+
+
 int cInventory::AddItem(const cItem & a_Item, bool a_AllowNewStacks)
 {
 	cItem ToAdd(a_Item);