(svn r13015) -Codechange: move some 'WP' structs out of window_gui.h to the .cpp files where they are actually used.

src/vehicle_gui.cpp

@@ -40,6 +40,11 @@
 #include "table/sprites.h"
 #include "table/strings.h"
 
+struct vehicledetails_d {
+	byte tab;
+};
+assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(vehicledetails_d));
+
 struct refit_d {
 	int sel;
 	struct RefitOption *cargo;