Fix for own recent reference count error.

- The armature weakref list was  being incref'd twice then decrefed twice (incref and decref were used incorrectly), now only once. My 'fix' broke this.
- In bpy_pydriver_create_dict the 2 refs added from running PyDict_SetItemString twice were undone when clearing the dictionary (added comment)
- changed Py_XDECREF to Py_DECREF int BPY_pyconstraint_update and BPY_pyconstraint_target, Py_XDECREF checs for NULL value which would have crashed blender before it got to Py_XDECREF anyway.
- after every error is reported (PyErr_Print), remove sys.last_traceback and clear the error, I found this fixed certain crashes (usually when starting the game engine or exiting blender), so best do this all the time.

- header_text.c, CcdPhysicsEnvironment.cpp, KX_CameraActuator.cpp - remove some warnings.

1 files changed, 5 insertions, 1 deletions

diff --git a/source/blender/nodes/intern/SHD_nodes/SHD_dynamic.c b/source/blender/nodes/intern/SHD_nodes/SHD_dynamic.c
index 2065ac2ed33..88efd47fa66 100644
--- a/source/blender/nodes/intern/SHD_nodes/SHD_dynamic.c
+++ b/source/blender/nodes/intern/SHD_nodes/SHD_dynamic.c
@@ -340,7 +340,11 @@ static void node_dynamic_pyerror_print(bNode *node)
 	PyGILState_STATE gilstate = PyGILState_Ensure();
 
 	fprintf(stderr, "\nError in dynamic node script \"%s\":\n", node->name);
-	if (PyErr_Occurred()) { PyErr_Print(); }
+	if (PyErr_Occurred()) {
+		PyErr_Print();
+		PyErr_Clear();
+		PySys_SetObject("last_traceback", NULL);
+	}
 	else { fprintf(stderr, "Not a valid dynamic node Python script.\n"); }
 
 	PyGILState_Release(gilstate);