oggz-rip: use oggz_stream_get_content_type instead of local ot_identify(), fix oggz_read() error check
oggz-rip: use oggz_stream_get_content_type instead of local ot_identify(),
fix oggz_read() error check


git-svn-id: ed696e516b63563c8842837a624e30c98be77b3c@3806 8158c8cd-e7e1-0310-9fa4-c5954c97daef

brion/liboggz,brion/liboggz,kfish/liboggz,kfish/liboggz,kfish/liboggz,brion/liboggz,brion/liboggz