[Setup-tool-hackers] xst_file_close

[Arturo Espinosa Aldama <arturo ximian com>]

Perl is bailing out when executing

close $fd;

and $fd eq undef, although the debugger says close undef and $a =
undef; close $a is legal.

So I changed all close code that is done over a variable (those done over
a GLOB are OK) to:

&xst_file_close (EXPR);

and I think we should use this simple function from now on.

Greets,
Arturo



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