Change percent in funcs.sh to percent_used for shrinking so as not to reset the sent percent value.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2029 71f96598-fa45-0410-b640-bcd6f8691b32
Forgot to push the stuff I needed push.  Here it is.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2030 71f96598-fa45-0410-b640-bcd6f8691b32