fix build on systems with Perl > 5.12.0 (Ubuntu 11.10 Oneiric, Mac OS X) due to split() incompatibility
fix build on systems with Perl > 5.12.0 (Ubuntu 11.10 Oneiric, Mac OS X) due to split() incompatibility

thanks mauke from #perl on freenode!
from http://perldoc.perl.org/perl5140delta.html
"split() no longer modifies @_ when called in scalar or void context. In void context it now produces a "Useless use of split" warning. This was also a perl 5.12.0 change that missed the perldelta."

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