signature has an 'x'

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@4265 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/fraps.c

@@ -32,7 +32,7 @@
  
 #include "avcodec.h"
 
-#define FPS_TAG MKTAG('F', 'P', 'S', '1')
+#define FPS_TAG MKTAG('F', 'P', 'S', 'x')
 
 /**
  * local variable storage