Index: mgp.h
--- mgp.h.orig
+++ mgp.h
@@ -310,6 +310,7 @@ struct ctrl {
 	u_char ct_flag;
 	u_int ct_page;
 	struct ctrl *ct_next;
+	int ct_type;
 	union {
 		struct ctrl_double ctrl_double;
 		struct ctrl_int ctrl_int;
@@ -327,6 +328,12 @@ struct ctrl {
 		struct ctrl_pcache ctrl_pcache;
 	} ct_val;
 };
+
+#define CTL_INT 0
+#define CTL_CHAR 1
+#define CTL_CHAR2 2
+#define CTL_DOUBLE 3
+#define CTL_LONG 4
 
 #define ctf_value	ct_val.ctrl_double.ct_value
 #define cti_value	ct_val.ctrl_int.ct_value