[gtk-vnc] Report a proper error message if hitting connection timeout

[Daniel P. Berrange <dberrange src gnome org>]

commit 283434730d0cc3a1ee8270e137d71cebe4f0e01b
Author: Daniel P. Berrange <berrange redhat com>
Date:   Tue Apr 11 11:06:28 2017 +0100

    Report a proper error message if hitting connection timeout
    
    Signed-off-by: Daniel P. Berrange <berrange redhat com>

 src/vncconnection.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/vncconnection.c b/src/vncconnection.c
index e5b43a0..2b2bdbb 100644
--- a/src/vncconnection.c
+++ b/src/vncconnection.c
@@ -103,6 +103,8 @@
 #endif
 
 
+#define GTK_VNC_ERROR g_quark_from_static_string("gtk-vnc")
+
 struct wait_queue
 {
     gboolean waiting;
@@ -5386,6 +5388,7 @@ static GSocket *vnc_connection_connect_socket(struct wait_queue *wait,
             *error = NULL;
             VNC_DEBUG("Socket pending");
             if (!g_io_wait_interruptable(wait, sock, G_IO_OUT|G_IO_ERR|G_IO_HUP)) {
+                g_set_error(error, GTK_VNC_ERROR, 0, "%s", "Connection timed out");
                 VNC_DEBUG("connect interrupted");
                 timeout = 0;
                 goto timeout;