Handle load error correctly.
Handle load error correctly.

When we fail to load a new document, we shouldn't manually delete
the SfxMedium instance there since SfxObjectShell gets to own it after
the DoLoadExternal call.  And we need to throw an error instead of simply
return from load().

Change-Id: Ic194d47dd1caaab3034aba1b9add54c9b5338a38

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core