wayland: Avoid pointer warp if constraint region is invalid

It may happen that the constraint region doesn't include the specified
cursor hint anymore. If that's the case, avoid warping the pointer.

BUG: 457021

src/pointer_input.cpp

@@ -669,7 +669,7 @@ void PointerInputRedirection::updatePointerConstraints()
                 lock->setLocked(false);
                 m_locked = false;
                 disconnectLockedPointerAboutToBeUnboundConnection();
-                if (!(hint.x() < 0 || hint.y() < 0) && focus()) {
+                if (!(hint.x() < 0 || hint.y() < 0 || !lock->region().contains(hint.toPoint())) && focus()) {
                     processMotionAbsolute(focus()->mapFromLocal(hint), waylandServer()->seat()->timestamp());
                 }
             }
@@ -684,7 +684,7 @@ void PointerInputRedirection::updatePointerConstraints()
             // In this case the cached cursor position hint must be fetched before the resource goes away
             m_lockedPointerAboutToBeUnboundConnection = connect(lock, &KWaylandServer::LockedPointerV1Interface::aboutToBeDestroyed, this, [this, lock]() {
                 const auto hint = lock->cursorPositionHint();
-                if (hint.x() < 0 || hint.y() < 0 || !focus()) {
+                if (hint.x() < 0 || hint.y() < 0 || !lock->region().contains(hint.toPoint()) || !focus()) {
                     return;
                 }
                 auto globalHint = focus()->mapFromLocal(hint);