ASN.1 print fix.

When printing out an ASN.1 structure if the type is an item template don't
fall thru and attempt to interpret as a primitive type.
Reviewed-by: NAndy Polyakov <appro@openssl.org>

crypto/asn1/tasn_prn.c

@@ -220,6 +220,7 @@ static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
             if (!asn1_template_print_ctx(out, fld, indent,
                                          it->templates, pctx))
                 return 0;
+            break;
         }
         /* fall thru */
     case ASN1_ITYPE_MSTRING: