libhb: fix missing format specifier in printf


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5998 b64f7644-9d1e-0410-96f1-a4d463321fa5
libhb: fix compiler warning
move struct chapter_s declaration to correct location.


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5999 b64f7644-9d1e-0410-96f1-a4d463321fa5