(svn r1090) -Fix: Made the _openttd_revision variable global, and with that

hopefully killed the windows-revision problem. If WITH_REV is defined, 
for both Windows as *nix system _openttd_revision is filled with normal 
info, else _openttd_revision is set to 'norev000'
-Fix: Small possible server-crash

win32.c

@@ -15,6 +15,11 @@
 
 #define SMART_PALETTE_ANIM
 
+/* Declare the revision tag for Windows */
+#ifdef WITH_REV_HACK
+	const char _openttd_revision[] = WITH_REV_HACK;
+#endif
+
 static struct {
 	HWND main_wnd;
 	HBITMAP dib_sect;
@@ -499,9 +504,8 @@ static void MakeWindow(bool full_screen)
 			SetWindowPos(_wnd.main_wnd, 0, x, y, w, h, SWP_NOACTIVATE | SWP_NOOWNERZORDER | SWP_NOZORDER);
 		} else {
 			char Windowtitle[50] = "OpenTTD ";
-			#ifdef WITH_REV_HACK
+			#ifdef WITH_REV
 				// also show revision number/release in window title
-				extern const char _openttd_revision[];
 				strncat(Windowtitle, _openttd_revision, sizeof(Windowtitle)-(strlen(Windowtitle) + 1));
 			#endif
 			_wnd.main_wnd = CreateWindow("TTD", Windowtitle, style, x, y, w, h, 0, 0, _inst, 0);