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--- fastx_toolkit-0.0.13/src/libfastx/sequence_alignment.h	2010-01-29 22:32:21.000000000 +0000
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+++ fastx_toolkit-0.0.13.new/src/libfastx/sequence_alignment.h	2012-01-09 11:09:36.142686410 +0000
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@@ -19,6 +19,7 @@
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 #define __SEQUENCE_ALIGNMENT_HEADER__
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 #include <err.h>
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+#include <unistd.h>
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 struct SequenceAlignmentResults
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 {