Segfalut related to updating addons

[supertuxkart-sourceforge-migration]

Author: kroartem

As usual, ubuntu 11.04 + intel graphics + the latest revision of stk [r9779].
Now when you press update button in addons menu, there is a warning 'Please wait while addons are updated'. In some cases this can take some time and a user can click on this warning, which will lead to a segfault.
gdb output:
Program received signal SIGSEGV, Segmentation fault.
operator= (this=0x69bc200, w=, h=,
id=) at states_screens/dialogs/addons_loading.cpp:303
303 } // doInstall
(gdb) bt
#0 operator= (this=0x69bc200, w=,

h=<value optimized out>, id=<value optimized out>)
at states_screens/dialogs/addons_loading.cpp:303

#1 operator= (this=0x69bc200, w=,

h=<value optimized out>, id=<value optimized out>) at ./addons/addon.hpp:32

#2 AddonsLoading::AddonsLoading (this=0x69bc200, w=,

h=<value optimized out>, id=<value optimized out>)
at states_screens/dialogs/addons_loading.cpp:47

#3 0x00000000005bf6d7 in AddonsScreen::eventCallback (this=0x68fc580, widget=

0x633dd20, name=..., playerID=<value optimized out>)
at states_screens/addons_screen.cpp:309

#4 0x000000000049114c in GUIEngine::EventHandler::sendEventToUser (

this=<value optimized out>, widget=0x633dd20, name=..., playerID=0)
at guiengine/event_handler.cpp:581

#5 0x0000000000491803 in GUIEngine::EventHandler::onWidgetActivated (

this=0x148d890, w=0x633dd20, playerID=0) at guiengine/event_handler.cpp:627

#6 0x0000000000491ecd in GUIEngine::EventHandler::onGUIEvent (this=0x148d890,

event=<value optimized out>) at guiengine/event_handler.cpp:660

#7 0x000000000049216d in GUIEngine::EventHandler::OnEvent (this=0x148d890,

event=...) at guiengine/event_handler.cpp:126

#8 0x0000000000664c10 in irr::gui::CGUIListBox::selectNew(int, bool) ()

---Type to continue, or q to quit---
#9 0x0000000000665b44 in irr::gui::CGUIListBox::OnEvent(irr::SEvent const&) ()
#10 0x000000000064910b in irr::gui::CGUIEnvironment::postEventFromUser(irr::SEvent const&) ()
#11 0x0000000000640874 in irr::CIrrDeviceStub::postEventFromUser(irr::SEvent const&) ()
#12 0x00000000006360ac in irr::CIrrDeviceLinux::run() ()
#13 0x0000000000466d93 in IrrDriver::update (this=0xeab150, dt=0.0280000009)

at graphics/irr_driver.cpp:1212

#14 0x000000000041124c in MainLoop::run (this=0x7fffe4049660)

at main_loop.cpp:156

#15 0x000000000040eb06 in main (argc=,

argv=<value optimized out>) at main.cpp:1119

(gdb)

[supertuxkart-sourceforge-migration]

Author: auria
Should be fixed in r9781, thanks for the testing :)