Bug 2385950

Description of problem:
Like https://bugzilla.redhat.com/show_bug.cgi?id=2385942#c0, I extended Krita horizontally quite far past the boundaries of the display. This is what caused https://bugzilla.redhat.com/show_bug.cgi?id=2361453#c17.

Version-Release number of selected component:
krita-5.2.11-1.fc42

Additional info:
reporter:       libreport-2.17.15
type:           CCpp
reason:         krita killed by SIGSEGV
journald_cursor: s=a2d6d580caa24cf3a9483be7f85033e4;i=1c6e9e;b=5f07eb01675f4c0ebd0e6f0a0cf4b60c;m=1b601b934;t=63b4e735214e5;x=adb0b7c9d2dc2aca
executable:     /usr/bin/krita
cmdline:        /usr/bin/krita
cgroup:         0::/user.slice/user-1000.slice/user/app.slice/app-\x2fusr\x2fbin\x2fkrita
rootdir:        /
uid:            1000
kernel:         6.15.8-200.fc42.x86_64
package:        krita-5.2.11-1.fc42
runlevel:       N 5
backtrace_rating: 4
crash_function: QXcbConnection::processXcbEvents
comment:        Like https://bugzilla.redhat.com/show_bug.cgi?id=2385942#c0, I extended Krita horizontally quite far past the boundaries of the display. This is what caused https://bugzilla.redhat.com/show_bug.cgi?id=2361453#c17.

Truncated backtrace:
Thread no. 1 (10 frames)
 #9 QXcbConnection::processXcbEvents at qxcbconnection.cpp:1051
 #10 xcbSourceDispatch at qxcbeventdispatcher.cpp:103
 #12 g_main_context_dispatch_unlocked at ../glib/gmain.c:4249
 #13 g_main_context_iterate_unlocked at ../glib/gmain.c:4314
 #14 g_main_context_iteration at ../glib/gmain.c:4379
 #15 QEventDispatcherGlib::processEvents at kernel/qeventdispatcher_glib.cpp:423
 #16 QEventLoop::exec at ../../include/QtCore/../../src/corelib/global/qflags.h:69
 #17 QCoreApplication::exec at kernel/qcoreapplication.cpp:1375
 #18 QGuiApplication::exec at kernel/qguiapplication.cpp:1863
 #19 QApplication::exec at kernel/qapplication.cpp:2832