LDAP: Add missing declaration for 'result'

lib/openldap.c

@@ -178,6 +178,7 @@ static Sockbuf_IO ldapsb_tls;
 
 static CURLcode ldap_connect(struct connectdata *conn, bool *done)
 {
+  CURLcode result;
   ldapconninfo *li = conn->proto.generic;
   struct SessionHandle *data=conn->data;
   int rc, proto = LDAP_VERSION3;