Suddenly closes when set Priority

[Nevem Nem]

SIGSEGV: Illegal memory access. Stacktrace::begin : * ./caesaria.linux64 : CrashHandler_handleCrash(int)+0x2c

• /lib/x86_64-linux-gnu/libc.so.6 : ()+0x36c30

• ./caesaria.linux64 : gui::Widget::isMyChild(gui::Widget*) const+0xb

• ./caesaria.linux64 : gui::ModalScreen::_canTakeFocus(gui::Widget*) const+0x27

• ./caesaria.linux64 : gui::ModalScreen::onEvent(NEvent const&)+0xa5

• ./caesaria.linux64 : gui::Ui::_drawTooltip(unsigned int)+0x176

• ./caesaria.linux64 : gui::Ui::draw()+0x26

• ./caesaria.linux64 : scene::Base::update(gfx::Engine&)+0x4a

• ./caesaria.linux64 : gamestate::GameLoop::update(gfx::Engine*)+0x44

• ./caesaria.linux64 : Game::exec()+0xde

• ./caesaria.linux64 : main()+0x255

• /lib/x86_64-linux-gnu/libc.so.6 : __libc_start_main()+0xf5

• ./caesaria.linux64() [0x56a1a1]

/using Kubuntu 14.04

[dalerank]

fix #365. fix crash on modal screen lock

→ <<cset 06c1e3e0eb2b>>