inc: win/winuser.bi: Re-add ENUMWINDOWSPROC type

http://www.freebasic.net/forum/viewtopic.php?f=3&t=23488

fbc's old Windows API headers had the ENUMWINDOWSPROC type and used it in
some places instead of WNDENUMPROC. However, it's not documented on MSDN
and doesn't exist in MS or MinGW-w64 headers. Thus it was lost in the
automated translation of the new headers. We should probably re-add it
for backwards-compatibility, as it's easy and it seems that people used it.

(cherry picked from commit 528fc7a)

Author: dkl

changelog.txt

@@ -12,7 +12,7 @@ Version 1.02.1
 - 1.02.0 regression: OpenGL binding: glGetString() and some others use ZString Ptr instead of GLubyte Ptr again
 - 1.02.0 regression: Windows API binding: REFIID and some other REF* types were missing; wsprintf/wvsprintf declarations were missing; ole2.bi couldn't be included directly/alone anymore.
 - bindings: Various previously untranslated (or wrongly translated) #defines in SDL2, X11, crt/pthread, Windows API
-- Windows API binding: DirectX headers missed some declarations and some didn't compile, win/commdlg.bi couldn't be #included behind windows.bi without WIN_INCLUDEALL because of missing #includes
+- Windows API binding: DirectX headers missed some declarations and some didn't compile, win/commdlg.bi couldn't be #included behind windows.bi without WIN_INCLUDEALL because of missing #includes; re-added the undocumented ENUMWINDOWSPROC type
 - crt/string.bi, crt/mem.bi: Added CONSTs to function declarations
 - #767: Illegal byref result assignments will now cause a proper error message, not just a warning
 - Using the -asm att|intel option for non-x86[_64] targets now triggers an error

inc/win/winuser.bi

@@ -35,6 +35,7 @@ type DLGPROC as function(byval as HWND, byval as UINT, byval as WPARAM, byval as
 type TIMERPROC as sub(byval as HWND, byval as UINT, byval as UINT_PTR, byval as DWORD)
 type GRAYSTRINGPROC as function(byval as HDC, byval as LPARAM, byval as long) as WINBOOL
 type WNDENUMPROC as function(byval as HWND, byval as LPARAM) as WINBOOL
+type ENUMWINDOWSPROC as WNDENUMPROC  '' custom name for backwards-compatibility (it existed in old headers despite being undocumented)
 type HOOKPROC as function(byval code as long, byval wParam as WPARAM, byval lParam as LPARAM) as LRESULT
 type SENDASYNCPROC as sub(byval as HWND, byval as UINT, byval as ULONG_PTR, byval as LRESULT)
 type PROPENUMPROCA as function(byval as HWND, byval as LPCSTR, byval as HANDLE) as WINBOOL