new constraints generation method

diff --git a/libasn1compiler/asn1c_misc.c b/libasn1compiler/asn1c_misc.c
index ee43696..c30174b 100644
--- a/libasn1compiler/asn1c_misc.c
+++ b/libasn1compiler/asn1c_misc.c
@@ -1,4 +1,6 @@
 #include "asn1c_internal.h"
+#include "asn1c_misc.h"
+
 #include <asn1fix_export.h>
 
 /*