[PATCH] Don't truncate integer part in to_char for 'FM99.'

Hi,

This patch fixes an edge case bug in the numeric to_char() function.

When the numeric to_char format used fillmode (FM), didn't contain 0s
and had a trailing dot, the integer part of the number was truncated in
error.

to_char(10, 'FM99.') used to return '1', after this patch it will return '10'

This is known to affect the format() function in the mysqlcompat
pgFoundry project.

Regards,
Marti