Rename some bondgun functions

src/include/constants.h

@@ -1115,12 +1115,12 @@
 #define GUNCMD_PLAYANIMATION     10
 #define GUNCMD_SETSOUNDSPEED     11
 
-#define GUNMEMOWNER_0  0
-#define GUNMEMOWNER_1  1
-#define GUNMEMOWNER_2  2
-#define GUNMEMOWNER_3  3
-#define GUNMEMOWNER_10 10
-#define GUNMEMOWNER_11 11
+#define GUNMEMOWNER_BONDGUN  0
+#define GUNMEMOWNER_INVMENU  1
+#define GUNMEMOWNER_CHRBODY  2
+#define GUNMEMOWNER_3        3
+#define GUNMEMOWNER_CHANGING 10
+#define GUNMEMOWNER_FREE     11
 
 #define GUNAMMOREASON_OPTION     0x01
 #define GUNAMMOREASON_NOCONTROL  0x02