fdo#39468 Translate comments to English in sw/source/core/unocore/unoobj.cxx

Change-Id: I67a3c80dbdfcd01e0bc0a38bc136a0f37b25c053
Reviewed-on: https://gerrit.libreoffice.org/7650
Reviewed-by: Chris Sherlock <chris.sherlock79@gmail.com>
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>
Tested-by: Norbert Thiebaud <nthiebaud@gmail.com>