Use NEED_BITMAP for no fonts, not X11 | SDL

Fixes crash when built without X11 or SDL, but with GDI (not default)

src/conio/Common.gmake

@@ -187,11 +187,9 @@ else
  endif
 endif
 
-ifdef NO_X
- ifndef WITH_SDL
-  CIOLIB-MT_CFLAGS		+=	-DNO_FONTS
-  CIOLIB_CFLAGS			+=	-DNO_FONTS
- endif
+ifndef NEED_BITMAP
+ CIOLIB-MT_CFLAGS		+=	-DNO_FONTS
+ CIOLIB_CFLAGS			+=	-DNO_FONTS
 endif
 
 ifdef NEED_BITMAP