gtk: fix possible memory leak about local_err

local_err in gd_vc_gfx_init() is not freed, and we don't use it,
so remove it.

Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
gtk: Don't crash if -nodefaults

This fixes a crash by just skipping the vte resize hack if cur is NULL.

Reproducer:

qemu-system-x86_64 -nodefaults

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Merge remote-tracking branch 'remotes/kraxel/tags/pull-gtk-20141121-1' into staging

gtk: two bugfixes for 2.2.

# gpg: Signature made Fri 21 Nov 2014 07:38:45 GMT using RSA key ID D3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"

* remotes/kraxel/tags/pull-gtk-20141121-1:
  gtk: Don't crash if -nodefaults
  gtk: fix possible memory leak about local_err

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>