Improve coherency between the File interface and the By buffer interface

Thanks to Zenitram for the review.

git-svn-id: svn://svn.code.sf.net/p/mediainfo/code/MediaInfoLib/trunk@6474 45c5ae6f-87cc-4fd0-92ee-e4f023fd80da
x B872, MOV: StreamOrder field was wrong in case of chapter references


git-svn-id: svn://svn.code.sf.net/p/mediainfo/code/MediaInfoLib/trunk@6476 45c5ae6f-87cc-4fd0-92ee-e4f023fd80da