[REVIEW 3.6] fdo#52640 right alignment of tabstop doesn't work

[David Tardon]

Hi all,

commit 104a855ade9102d694293c1059f99946752f76d8 fixes $subj. It was
caused by the 'const' in editeng/source/editeng/impedit3.cxx on line
1152. Because of that, a wrong overload of TextPortion::GetSize() was
selected on the following line, so the width adjustment was made on a
temporary Size object.

D.