Regression from commit 50223ea6
(tdf#98987 sw: add AddVerticalFrameOffsets compat mode, 2016-03-31),
SwFEShell::ImpEndCreate() was not adapted to call
SwTextFrame::GetBaseVertOffsetForFly() when determining the vertical
position of the inserted shape.

The call can be unconditional, the returned value is already 0 when the
DocumentSettingId::ADD_VERTICAL_FLY_OFFSETS compat setting is false.

(cherry picked from commit 4218caf1)

Conflicts:
	sw/qa/extras/uiwriter/uiwriter2.cxx

Change-Id: Iec6af5a6d1ff3466e08377853cc8ca84f33a76d1
Reviewed-on: https://gerrit.libreoffice.org/69766
Tested-by: Jenkins
Reviewed-by: Xisco Faulí <xiscofauli@libreoffice.org>