SfxObjectShell::CopyStoragesOfUnknownMediaType: still try to copy Base streams
SfxObjectShell::CopyStoragesOfUnknownMediaType: still try to copy Base streams

When Base is embedded in a Writer document, we still need this when the
document is saved for the first time after embedding.

Change-Id: I1103da01838abd4ac1b03dc4d44e10db3ce650bc

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