Minor problems in MSVC build fixed

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

src/tcp_connecter.cpp

@@ -179,7 +179,8 @@ int zmq::tcp_connecter_t::get_new_reconnect_ivl ()
 
 int zmq::tcp_connecter_t::set_address (const char *addr_)
 {
-    return resolve_ip_hostname (&addr, &addr_len, addr_, options.ipv4only);
+    return resolve_ip_hostname (&addr, &addr_len, addr_,
+        options.ipv4only ? true : false);
 }
 
 int zmq::tcp_connecter_t::open ()

src/tcp_listener.cpp

@@ -123,7 +123,8 @@ void zmq::tcp_listener_t::close ()
 int zmq::tcp_listener_t::set_address (const char *addr_)
 {
     //  Convert the interface into sockaddr_in structure.
-    int rc = resolve_ip_interface (&addr, &addr_len, addr_, options.ipv4only);
+    int rc = resolve_ip_interface (&addr, &addr_len, addr_,
+        options.ipv4only ? true : false);
     if (rc != 0)
         return -1;
 

src/zmq.cpp

@@ -593,7 +593,7 @@ int zmq_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
 #if defined ZMQ_HAVE_WINDOWS
             int rc = select (0, &inset, &outset, &errset, ptimeout);
             if (unlikely (rc == SOCKET_ERROR)) {
-                wsa_error_to_errno ();
+                zmq::wsa_error_to_errno ();
                 if (errno == ENOTSOCK)
                     return -1;
                 wsa_assert (false);