[EMBOSS] emboss 2.10 'marscan' now silently fails on Mac OS X 10.4

[ajb at ebi.ac.uk]

Marscan was, confusingly, not sending suitable negative results to an output
file for some test sequences with no matching sites (and just producing
an empty output file). This was happening on all OSs.

A fix has been put into:

   ftp://emboss.open-bio.org/pub/EMBOSS/fixes/marscan.c

This will work on versions 3 & 2.10

Alan