Commit 74c5ed19 (DOCX import fix for
table with auto size, 2013-06-26) correctly recognized that in case the
width type is auto, that doesn't always mean text::SizeType::VARIABLE.

However, when the size is fixed, then we should simply not do anything,
and that'll lead to the right behavior (by setting the column separators
on each row), don't try to be smart and try to set
TablePropertyMap::TABLE_WIDTH here.

Change-Id: I997b88e5fa34bbabe7c6940879c81a1d62d69043