Related fdo#75971 Crash when invoking "Insert > Names > Create"

bt:
0x00002aaac837cd3c in rtl::OUString::copy (this=0x7ffffffec760, beginIndex=-2147483595) at /home/julien/compile-libreoffice/libreoffice/include/rtl/ustring.hxx:1464
0x00002aaac87604ea in ScInterpreter::ScRight (this=0x8a6b7a0) at /home/julien/compile-libreoffice/libreoffice/sc/source/core/tool/interpr1.cxx:8106
0x00002aaac879be5c in ScInterpreter::Interpret (this=0x8a6b7a0) at /home/julien/compile-libreoffice/libreoffice/sc/source/core/tool/interpr4.cxx:4150

So apply similar fix http://cgit.freedesktop.org/libreoffice/core/commit/?id=37d7d115dd346ba7a713a5a18d90fc48a0d35072
to scRight

Cherry-picked from b41504503cdf4ac562f82e668bf2fe9217260493

Change-Id: I576e82cd033f0e0e5f9e9cbb9dd5f569782bbbc4
Reviewed-on: https://gerrit.libreoffice.org/9536
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>