Start work on OP_MoveMultipleItems (RoF+)

Currently it just kicks to prevent desyncs

common/emu_oplist.h

@@ -340,6 +340,7 @@ N(OP_MOTD),
 N(OP_MoveCoin),
 N(OP_MoveDoor),
 N(OP_MoveItem),
+N(OP_MoveMultipleItems),
 N(OP_MoveLogDisregard),
 N(OP_MoveLogRequest),
 N(OP_MultiLineMsg),

common/patches/rof2_structs.h

@@ -1827,6 +1827,20 @@ struct MoveItem_Struct
 /*0028*/
 };
 
+struct MultiMoveItemSub_Struct
+{
+/*0000*/ InventorySlot_Struct	from_slot;
+/*0012*/ InventorySlot_Struct	to_slot;
+/*0024*/ uint32			number_in_stack;
+/*0028*/ uint8			unknown[8];
+};
+
+struct MultiMoveItem_Struct
+{
+/*0000*/ uint32	count;
+/*0004*/ MultiMoveItemSub_Struct moves[0];
+};
+
 //
 // from_slot/to_slot
 // -1 - destroy