Bug#632384: qutecom crashing

[lkcl luke]

it's actually more serious than this - and also easier to reproduce.
simply go to "enable video", select the webcam and qutecom instantly
crashes.  no connection, no registration, no internet is required.

(warn) 15:26:23 [Common] virtual WebcamErrorCode
V4L2WebcamDriver::setPalette(pixosi): Failed settings pixel format.
Qt has caught an exception thrown from an event handler. Throwing
exceptions from an event handler is not supported in Qt. You must
reimplement QApplication::notify() and catch all exceptions there.

terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string::_S_construct null not valid

Program received signal SIGABRT, Aborted.
0x00007fffee55e405 in raise () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) where
#0  0x00007fffee55e405 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007fffee561680 in abort () from /lib/x86_64-linux-gnu/libc.so.6
#2  0x00007fffeee06e8d in __gnu_cxx::__verbose_terminate_handler() ()
   from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3  0x00007fffeee05036 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007fffeee05063 in std::terminate() () from
/usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5  0x00007fffeee051a6 in __cxa_rethrow () from
/usr/lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007ffff39d1e24 in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007ffff39d6d78 in QCoreApplication::exec() () from
/usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00000000005abf21 in main ()
(gdb) quit
A debugging session is active.