Fix compilation error with Visual Studio 2022

This old code (unchanged since 1998) wouldn't compile with the current
version of Visual Studio 2022.

Fix backported from 1.4.0 (c4bb4e192e).
Original commit by Matthias Melcher.

CHANGES

@@ -1,4 +1,4 @@
-CHANGES IN FLTK 1.3.9					RELEASED: ???
+CHANGES IN FLTK 1.3.9					RELEASED: Nov ?? 2022
 
 FLTK 1.3.9 is a maintenance release with some fixes and enhancements.
 
@@ -7,6 +7,8 @@ Details:
   Albrecht Schlosser:
     Backport X11 INCR protocol fixes from 1.4.0 (issue #451)
     X11: Suppress compiler warnings when using gcc or clang
+    Fix crash if a program exits before it opens a window (STR 3484).
+    Fix compilation error with current Visual Studio 2022
 
   ManoloFLTK:
     macOS platform: fix for issue #325 Disabling IM disables Greek and Cyrillic layouts
@@ -14,6 +16,7 @@ Details:
     Fix for issue #373 apparent with macOS platform and SDK ≤ 10.13
     Fi xfor issue #452:  Fl::get_font_name failure on OS-X.
     Fix for issue #454 : crash in Fl::get_font_name().
+    Issue #469: Fl_Sys_Menu_Bar menu item shortcuts using Escape or Tab do not work on Mac
 
   YX:
     Fix IME problem (issue #270)

test/resizebox.cxx

@@ -16,10 +16,6 @@
 //     http://www.fltk.org/str.php
 //
 
-#define W1 (big ? 60 : 40)
-#define B 0
-#define W3 (5*W1+6*B)
-
 #include <FL/Fl.H>
 #include <FL/Fl_Double_Window.H>
 #include <FL/Fl_Box.H>
@@ -27,6 +23,10 @@
 #include <FL/fl_draw.H>
 #include <FL/fl_message.H>
 
+#define W1 (big ? 60 : 40)
+#define B 0
+#define W3 (5*W1+6*B)
+
 Fl_Double_Window *window;
 Fl_Box *box;