gtk: don't use g_object_unref on GdkCursor

It's not a GObject.

Cc: Gerd Hoffman <kraxel@redhat.com>
Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
v1 -> v2
 - Fix summary to agree with code (Peter)
(cherry picked from commit 171392406d8e230d62e5ebf4805f71460854b8ec)
[bnc#830459]

Signed-off-by: Bruce Rogers <brogers@suse.com>
gtk: Fix compiler warning (GTK 3 deprecated function)

With GTK 3, the function gdk_cursor_unref is deprecated:

qemu/ui/gtk.c: In function ‘gd_cursor_define’:
qemu/ui/gtk.c:380:5: error:
 ‘gdk_cursor_unref’ is deprecated (declared at /usr/include/gtk-3.0/gdk/gdkcursor.h:233): Use 'g_object_unref' instead [-Werror=deprecated-declarations]

Fix the gcc compiler warning by using conditional compilation.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Message-id: 1371391987-10795-1-git-send-email-sw@weilnetz.de
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit 030b4b7debf659dcd6fc66826564285fdce5057d)
[bnc#830459]

Signed-off-by: Bruce Rogers <brogers@suse.com>