oggenc: Fix the EOS flag

This corrects the bug that caused the checksums to change in
9767d7c0.

It caused the EOS flag to be set incorrectly; the ogg spec does not
allow it to be set in the middle of a logical bitstream.
Signed-off-by: Andrew Kelley <superjoe30@gmail.com>
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/oggenc.c

@@ -401,7 +401,7 @@ static void ogg_write_pages(AVFormatContext *s, int flush)
         if (oggstream->page_count < 2 && !flush)
             break;
         ogg_write_page(s, &p->page,
-                       flush && oggstream->page_count == 1 ? 4 : 0); // eos
+                       flush == 1 && oggstream->page_count == 1 ? 4 : 0); // eos
         next = p->next;
         av_freep(&p);
         p = next;
@@ -540,7 +540,7 @@ static int ogg_write_header(AVFormatContext *s)
 
     oggstream->page.start_granule = AV_NOPTS_VALUE;
 
-    ogg_write_pages(s, 1);
+    ogg_write_pages(s, 2);
 
     return 0;
 }

tests/ref/lavf/ogg

-3c41e917d95f925eaa8f2e31972edcfa *./tests/data/lavf/lavf.ogg
+8ca901bc8d24b80ebe79e387e454d1e9 *./tests/data/lavf/lavf.ogg
 13476 ./tests/data/lavf/lavf.ogg
 ./tests/data/lavf/lavf.ogg CRC=0x3a1da17e