Don't use undef value in Config::myconfig

Don't use undef value in Config::myconfig

Subject: Config->myconfig not -w clean

Thanks to a report by Larry Virden I spotted a bug in Config.pm.
Undefined values trigger "Use of undefined value" messages, e.g.

# perl -MConfig -we 'print Config->myconfig'
Use of uninitialized value at /usr/local/lib/perl5/IP22-irix/5.004/Config.pm line 553.
Use of uninitialized value at /usr/local/lib/perl5/IP22-irix/5.004/Config.pm line 553.
Use of uninitialized value at /usr/local/lib/perl5/IP22-irix/5.004/Config.pm line 553.
Use of uninitialized value at /usr/local/lib/perl5/IP22-irix/5.004/Config.pm line 553.
Summary of my perl5 (5.0 patchlevel 4 subversion 0) configuration:
  Platform:
[...]

I'd suggest this simple patch:

Credited: Chip Salzenberg <salzench@nielsenmedia.com>

p5p-msgid: 199706271525.RAA13517@sissy.in-berlin.de