Add a constant for NumLock This trivial patch adds the name of the Numlock modifier
diff --git a/xkbcommon/xkbcommon-names.h b/xkbcommon/xkbcommon-names.h
index db071d8..ecb551f 100644
--- a/xkbcommon/xkbcommon-names.h
+++ b/xkbcommon/xkbcommon-names.h
@@ -35,6 +35,7 @@
#define XKB_MOD_NAME_CAPS "Lock"
#define XKB_MOD_NAME_CTRL "Control"
#define XKB_MOD_NAME_ALT "Mod1"
+#define XKB_MOD_NAME_NUM "Mod2"
#define XKB_MOD_NAME_LOGO "Mod4"
#define XKB_LED_NAME_CAPS "Caps Lock"