Commit 98f0e0ed introduced TAB function
but its declaration in basic/source/runtime/stdobj.cxx is missing its argument
So it used TAN function as argument

Change-Id: Id4461ca805f9c7034b0440de46b845f29f57e3b0
Reviewed-on: https://gerrit.libreoffice.org/29437Reviewed-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Julien Nabet <serval2412@yahoo.fr>
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>