Fix include.

Change-Id: I5870b31c0d9f93f5179a73709dbe49db73338b6d
diff --git a/obj/axt3.c b/obj/axt3.c
index bd06baf..b557471 100644
--- a/obj/axt3.c
+++ b/obj/axt3.c
@@ -7,6 +7,7 @@
 */
 inherit "/std/weapon";
 
+#include <new_skills.h>
 #include __PATH__(1)"defs.h"