Make v4l.c's video_formats constant and static.

Patch by Diego 'Flameeyes' Pettenò flameeyes ¤ gmail ! com


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@11443 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavdevice/v4l.c

@@ -46,7 +46,7 @@ typedef struct {
     int gb_frame;
 } VideoData;
 
-struct {
+static const struct {
     int palette;
     int depth;
     enum PixelFormat pix_fmt;