gtk+-2.20.0 两个bug

gtk 官方最新的库gtk+-2.20.0有两个bug导致编译失败，可以通过下面方法修改：

（1）在gdk.symbols 871行后面增加：

863 #if IN_HEADER(__GDK_KEYS_H__)

864 #if IN_FILE(__GDK_KEYS_DIRECTFB_C__)

865 gdk_keymap_get_direction

866 gdk_keymap_get_entries_for_keycode

867 gdk_keymap_get_entries_for_keyval

868 gdk_keymap_get_for_display

869 gdk_keymap_get_caps_lock_state

870 gdk_keymap_lookup_key

871 gdk_keymap_translate_keyboard_state

+872 gdk_keymap_map_virtual_modifiers

+873 gdk_keymap_add_virtual_modifiers

874 gdk_keyval_from_name

875 gdk_keyval_name G_GNUC_CONST

876 #endif

877 #endif

（2）在gdk/directfb/gdkkeys-directfb.c 增加上面两个函数的定义

+ 2001 gboolean

+ 2002 gdk_keymap_map_virtual_modifiers (GdkKeymap *keymap,

+ 2003 GdkModifierType *state)

+ 2004 {

+ 2005 g_warning("gdk_keymap_add_virtual_modifiers unimplemented /n");

+ 2006 return TRUE;

+ 2007 }

+ 2008 void

+ 2009 gdk_keymap_add_virtual_modifiers (GdkKeymap *keymap,

+ 2010 GdkModifierType *state)

+ 2011 {

+ 2012 g_warning("gdk_keymap_map_virtual_modifiers unimplemented /n");

+ 2013 return TRUE;

+ 2014 }