Bump lavfi minor and add APIchanges entry after the rename of

AVFilterInOut.filter.

Originally committed as revision 25701 to svn://svn.ffmpeg.org/ffmpeg/trunk

doc/APIchanges

@@ -13,6 +13,10 @@ libavutil:   2009-03-08
 
 API changes, most recent first:
 
+2010-11-04 - r25700 - lavfi 1.57.0 - AVFilterInOut
+  Rename field AVFilterInOut.filter to AVFilterInOut.filter_ctx.
+  This change breaks libavfilter API.
+
 2010-11-04 - r25674 - lavfi 1.56.0 - avfilter_graph_free()
   Rename avfilter_graph_destroy() to avfilter_graph_free().
   This change breaks libavfilter API/ABI.

libavfilter/avfilter.h

@@ -25,7 +25,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  1
-#define LIBAVFILTER_VERSION_MINOR 56
+#define LIBAVFILTER_VERSION_MINOR 57
 #define LIBAVFILTER_VERSION_MICRO  0
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \