[mythtv] MythControls seg faults on frontend-only machines (formerly QGDictIterator::toFirst: Dictionary has been deleted)

[Brent Fisher]

The "Edit Keys" menu option seems to cause a segmentation fault on 
machines that are not running mythbackend.  I've got 3 machines running 
mythfrontend.  Only one of these runs mythbackend.  "Edit Keys" causes 
the two frontend-only machines to crash but works fine on the backend 
machine.

Please see the attached back trace.

My setup:

mythbackend server:

$ uname -a
Linux smeagol 2.6.13-gentoo-r5 #1 Mon Nov 7 21:40:38 MST 2005 i686 AMD 
Duron(tm) Processor AuthenticAMD GNU/Linux

# mythbackend --version
Library API version: 0.19.20060121-2
Source code version: Unknown
Options compiled in:
linux release using_v4l using_oss using_alsa using_ivtv using_lirc 
using_x11 using_xv using_xrandr using_xvmc using_opengl_vsync 
using_frontend using_backend

mythfrontend #1:  (back trace generated on this machine)

$ uname -a
Linux samwise 2.6.13-gentoo-r5 #4 Mon Jan 9 22:01:26 MST 2006 i686 VIA 
Nehemiah CentaurHauls GNU/Linux

$ mythfrontend --version
Library API version: 0.19.20060121-2
Source code version: Unknown
Options compiled in:
linux debug using_xvmcw using_v4l using_oss using_alsa using_ivtv 
using_lirc using_x11 using_xv using_xrandr using_xvmc using_xvmc_vld 
using_opengl_vsync using_frontend using_backend

mythfrontend #2:

$ uname -a
Linux stewie 2.6.15-gentoo-r1 #4 PREEMPT Thu Feb 2 21:51:07 MST 2006 
x86_64 AMD Athlon(tm) 64 Processor 3700+ AuthenticAMD GNU/Linux

$ mythfrontend --version
Library API version: 0.19.20060121-2
Source code version: Unknown
Options compiled in:
linux release using_v4l using_alsa using_ivtv using_x11 using_xv 
using_dvdnav using_xrandr using_opengl_vsync using_frontend using_backend

-Brent
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