[FFmpeg-cvslog] doc/filters: fix copy&paste error in volume_justin documentation

[Stefano Sabatini]

ffmpeg | branch: master | Stefano Sabatini <stefasab at gmail.com> | Sat Dec  8 15:38:20 2012 +0100| [759e7a237fb60a5a0a157921867fcb73d90e2c53] | committer: Stefano Sabatini

doc/filters: fix copy&paste error in volume_justin documentation

Spotted by ubitux.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=759e7a237fb60a5a0a157921867fcb73d90e2c53
---

 doc/filters.texi |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/filters.texi b/doc/filters.texi
index cb2c899..8e70cdb 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -927,7 +927,7 @@ The filter accepts the following named parameters. If the key of the
 first options is omitted, the arguments are interpreted according to
 the following syntax:
 @example
-drawbox=@var{volume}:@var{precision}
+volume=@var{volume}:@var{precision}
 @end example
 
 @table @option