Forgotten oma docs stuff

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@13766 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

doc/general.texi

@@ -139,6 +139,8 @@ different game cutscenes repacked for use with ScummVM.
 @tab Interchange File Format
 @item BFI @tab    @tab X
 @tab Brute Force & Ignorance, used in Flash Traffic: City of Angels
+@item OMA @tab    @tab X
+@tab Audio format used in Sony Sonic Stage and Sony Vegas
 @end multitable
 
 @code{X} means that encoding (resp. decoding) is supported.