nullwriter now keeps track of how many bytes were written

diff --git a/lib/bitio.c b/lib/bitio.c
index 61d6ee0..2394121 100644 (file)
--- a/lib/bitio.c
+++ b/lib/bitio.c
@@ -175,6 +175,7 @@ void writer_init_filewriter2(struct writer_t*w, char*filename)
 
 static int writer_nullwrite_write(struct writer_t*w, void* data, int len) 
 {
+    w->pos += len;
     return len;
 }
 static void writer_nullwrite_finish(struct writer_t*w)