Please fix undefined sprintf() usage in mafft

[David Paleino <d.paleino@gmail.com>]

Hello,
I'm sending you a patch for mafft. It has been reported that the usage of:

  sprintf(buf, "%s foo %d %d", buf, var1, var2);

is undefined behaviour, and should be fixed as:

  sprintf(buf + strlen(buf), " foo %d %d", var1, var");

I've made a patch that applies to the mafft package in Debian, please consider
integrating it upstream.

You can read more on the above issue at:
  <http://lists.debian.org/debian-devel/2008/12/msg01079.html>

Kindly,
David Paleino
Debian-Med Team

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