Scope reduction in GetBLIP() & remove non-ASCII character (degree symbol).

Change-Id: I306a22b087aceed5dbb6cb2e8b67e2501589ee61
Revert "Resolves: #i125187# more precision where the BLIP graphic is located"

This reverts commit 3ea17073114cae99d7c323f051a4a2ba074f043c.

That change from AOO single-handedly broke all image import from xls
binary files.

Change-Id: I384ae8f286ccc9d39e64de9da5ef6458af0a0972