It makes no sense to create object container when no objects are embedded.

Change-Id: Id13a0955a2b26dcc06766ad85f6ff9c598b4f0f2
Bail out early if it's not a chart module.

Change-Id: I2e487b79671153786f02f12b4aac2b32476585e4
Let's not forget to free the SdrOle2Obj instance here.

When the chart creation wizard is cancelled.

Change-Id: I5eb2b2719ce3ec1eaa180a8c7193df23794dc03d