add an mgflags parameter to mapglyph() to alter how it behaves internally

avoid a recent save-value,call,restore-value kludge by adding
an mgflags parameter to mapglyph() to control its behavior

 Changes to be committed:
	modified:   doc/window.doc
	modified:   include/extern.h
	modified:   include/hack.h
	modified:   src/detect.c
	modified:   src/mapglyph.c
	modified:   src/pager.c
	modified:   sys/amiga/winfuncs.c
	modified:   sys/wince/mhmap.c
	modified:   win/Qt/qt_win.cpp
	modified:   win/Qt4/qt4map.cpp
	modified:   win/X11/winmap.c
	modified:   win/curses/cursdial.c
	modified:   win/curses/cursinvt.c
	modified:   win/curses/cursmain.c
	modified:   win/gem/wingem.c
	modified:   win/tty/wintty.c
	modified:   win/win32/mhmap.c
	modified:   win/win32/mswproc.c

sys/wince/mhmap.c

@@ -632,7 +632,7 @@ onPaint(HWND hWnd)
 #else
                         /* rely on NetHack core helper routine */
                         (void) mapglyph(data->map[i][j], &mgch, &color,
-                                        &special, i, j);
+                                        &special, i, j, 0);
                         ch = (char) mgch;
                         if (((special & MG_PET) && iflags.hilite_pet)
                             || ((special & MG_DETECT)