Add includes in synopsis.
Submitted by: Mike Frysinger <vapier@gentoo.org>
diff --git a/doc/crypto/ASN1_STRING_new.pod b/doc/crypto/ASN1_STRING_new.pod
index 5b1bbb7..8ac2a03 100644
--- a/doc/crypto/ASN1_STRING_new.pod
+++ b/doc/crypto/ASN1_STRING_new.pod
@@ -7,6 +7,8 @@
 
 =head1 SYNOPSIS
 
+ #include <openssl/asn1.h>
+
  ASN1_STRING * ASN1_STRING_new(void);
  ASN1_STRING * ASN1_STRING_type_new(int type);
  void ASN1_STRING_free(ASN1_STRING *a);