Don't use a field size for the last argument of printf format,

Don't use a field size for the last argument of printf format,
because in this case the string is left-aligned and it is not
truncated anyways.

Omitting the field size prevents the generation of trailing whitespace,
which makes the string fit in smaller windows.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@76037 65c4cc65-6c06-0410-ace0-fbb531ad65f3