Fix an invalid-free-bug in the ogg audio format handler code.

Fix an invalid-free-bug in the ogg audio format handler code.

In process_ogg_packets(), if ogg_sync_pageout() fails, we jmp to
the out label where "stream" is being freed by ogg_stream_clear()
without being initialized.

This causes para_afh and para_server to segfault in libogg:

	*** glibc detected *** para_afh: munmap_chunk(): invalid pointer: 0x6f890d42 ***
	======= Backtrace: =========
	/usr/lib/glibc/lib/libc.so.6(+0x66e5a)[0x6f712e5a]
	/usr/lib/glibc/lib/libc.so.6(+0x68021)[0x6f714021]
	/usr/local/lib/libogg.so.0(ogg_stream_clear+0x2f)[0x6f891adf]
	para_afh[0x804cb52]
	para_afh[0x804cbeb]
	para_afh[0x804ce59]
	para_afh[0x804be71]
	para_afh[0x804a97c]
	/usr/lib/glibc/lib/libc.so.6(__libc_start_main+0xd9)[0x6f6c2c79]
	para_afh[0x8049991]

Fix this bug by returning the error code directly rather than jumping
to "out".