Make V_ASN1_APP_CHOOSE work again.

CHANGES

@@ -4,6 +4,10 @@
 
  Changes between 0.9.5 and 0.9.5a  [XX XXX 2000]
 
+  *) Fix so V_ASN1_APP_CHOOSE works again: however its use is strongly
+     discouraged.
+     [Steve Henson, pointed out by Brian Korver <briank@cs.stanford.edu>]
+
   *) For easily testing in shell scripts whether some command
      'openssl XXX' exists, the new pseudo-command 'openssl no-XXX'
      returns with exit code 0 iff no command of the given name is available.

crypto/x509/x509name.c

@@ -352,7 +352,7 @@ int X509_NAME_ENTRY_set_data(X509_NAME_ENTRY *ne, int type,
 	int i;
 
 	if ((ne == NULL) || ((bytes == NULL) && (len != 0))) return(0);
-	if(type & MBSTRING_FLAG) 
+	if((type > 0) && (type & MBSTRING_FLAG)) 
 		return ASN1_STRING_set_by_NID(&ne->value, bytes,
 						len, type,
 					OBJ_obj2nid(ne->object)) ? 1 : 0;