lavf/avio.h: doxygen avio_flush()

libavformat/avio.h

@@ -259,9 +259,14 @@ int url_feof(AVIOContext *s);
 /** @warning currently size is limited */
 int avio_printf(AVIOContext *s, const char *fmt, ...) av_printf_format(2, 3);
 
+/**
+ * Force flushing of buffered data to the output s.
+ *
+ * Force the buffered data to be immediately written to the output,
+ * without to wait to fill the internal buffer.
+ */
 void avio_flush(AVIOContext *s);
 
-
 /**
  * Read size bytes from AVIOContext into buf.
  * @return number of bytes read or AVERROR