Fixed a bug when loading in fasta files consisting of all sequence on
a single line and in lowercase.

The uppercasing code was only being called during the loop to strip
out newlines.


git-svn-id: svn://svn.code.sf.net/p/staden/code/io_lib@3584 ba6f2710-ca9f-427c-89d3-5bf716dbc8e1