function result as a variable, and Delphi/TP-like "using the function name
    inside the function means a recursive call". In order to prevent
    confusion, we no longer support the former behaviour since r21817
    because the conditions under which one or the other holds are not well
    defined and it's easier to fix a compiler error then to discover why
    a recursive function call doesn't do anything (mantis #22344)

git-svn-id: trunk@24182 -