What should be done in an application which expects a return code of unsetenv (which is void)?

[Andrés]

The function is this:

static gboolean xunsetenv(char *varname)
{
    if (unsetenv(varname) != 0) {
         console_message(_("unsetenv failed!"));
         return TRUE;
    }
    return FALSE;
}

It tries to manipulate the return code of unsetenv, but it does not
return one; so, what is the right thing to do?

The application I'm trying to port is mhwaveedit, a GTK+2 audio editor.

Greetings