BGE showstopper bug fix:

- Reset hit object pointer at end of frame of touch sensor to avoid returning invalid pointer to getHitObject().
- Clear all references in KX_TouchSensor::m_colliders when the sensor is disabled to avoid loose references. 
- Test GetSGNode() systematically for all KX_GameObject functions that can be called from python in case a python controller keeps a reference in GameLogic (bad practice anyway).

1 files changed, 8 insertions, 0 deletions

diff --git a/source/gameengine/Ketsji/KX_TouchSensor.cpp b/source/gameengine/Ketsji/KX_TouchSensor.cpp
index 41757a23f7a..2802da2723d 100644
--- a/source/gameengine/Ketsji/KX_TouchSensor.cpp
+++ b/source/gameengine/Ketsji/KX_TouchSensor.cpp
@@ -55,9 +55,17 @@ void KX_TouchSensor::SynchronizeTransform()
 
 void KX_TouchSensor::EndFrame() {
 	m_colliders->ReleaseAndRemoveAll();
+	m_hitObject = NULL;
 	m_bTriggered = false;
 }
 
+void KX_TouchSensor::UnregisterToManager()
+{
+	// before unregistering the sensor, make sure we release all references
+	EndFrame();
+	m_eventmgr->RemoveSensor(this);
+}
+
 bool KX_TouchSensor::Evaluate(CValue* event)
 {
 	bool result = false;