appease iwyu too

Author: ehughsbaird

src/generic_factory.h

@@ -36,11 +36,12 @@
 #include "string_formatter.h"
 #include "string_id.h"
 #include "units.h"
-#include "weighted_list.h"
 
 class quantity;
 
 template <typename E> class enum_bitset;
+template<typename T> struct weighted_int_list;
+template <typename T, typename W> struct weighted_list;
 
 /**
 A generic class to store objects identified by a `string_id`.

src/magic_ter_fur_transform.cpp

@@ -20,7 +20,8 @@
 #include "translation.h"
 #include "trap.h"
 #include "type_id.h"
-#include "weighted_list.h"
+
+template<typename T> struct weighted_int_list;
 
 namespace
 {

src/mapgen_functions.cpp

@@ -21,6 +21,7 @@
 #include "debug.h"
 #include "flood_fill.h"
 #include "map.h"
+#include "mapdata.h"
 #include "map_iterator.h"
 #include "map_scale_constants.h"
 #include "mapgen.h"