Add compiletime asserts to verify size hasn't changed.

src/openrct2/windows/tile_inspector.c

@@ -696,6 +696,7 @@ static void window_tile_inspector_paste_element(rct_window *w)
 	// Construct the data to send using the surface's properties
 	sint32 data[2];
 	memcpy(&data[0], &tileInspectorCopiedElement, 8);
+	static_assert(sizeof(data) == sizeof(tileInspectorCopiedElement), "Sizes do not match");
 
 	game_do_command(
 		TILE_INSPECTOR_ANY_PASTE,

src/openrct2/world/map.c

@@ -5644,6 +5644,7 @@ void game_command_modify_tile(sint32* eax, sint32* ebx, sint32* ecx, sint32* edx
 		rct_map_element element_to_paste;
 		sint32 data[] = { *edx, *edi };
 		memcpy(&element_to_paste, data, 8);
+		static_assert(sizeof(data) == sizeof(element_to_paste), "Sizes do not match");
 		*ebx = tile_inspector_paste_element_at(x, y, element_to_paste, flags);
 		return;
 	}