Bug#751347: Fix

[Francois Marier]

It turns out that this is caused by the interaction between grep and head:

  http://www.perlmonks.org/?node_id=415562

I've attached a simple patch which filters out these harmless warnings.

Francois

-- 
Francois Marier           identi.ca/fmarier
http://fmarier.org      twitter.com/fmarier
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