added missing exported functions ogg_stream_pageout_fill and ogg_stream_flush_fill to compile and use libogg under Visual Studio

Signed-off-by: Ralph Giles <giles@thaumas.net>

win32/ogg.def

diff --git a/win32/ogg.def b/win32/ogg.def
index 744d6be..250e4ba 100644
--- a/win32/ogg.def
+++ b/win32/ogg.def
@@ -63,6 +63,8 @@
 ogg_stream_reset_serialno
 ogg_stream_destroy
 ogg_stream_eos
+ogg_stream_pageout_fill
+ogg_stream_flush_fill
 ;
 ogg_page_checksum_set
 ogg_page_version