cmdutils.c uses FFMPEG_CONFIGURATION from config.h without directly including

config.h so that compilation without HAVE_AV_CONFIG_H fails.
patch by Ronald S. Bultje, rsbultje gmail com

Originally committed as revision 10619 to svn://svn.ffmpeg.org/ffmpeg/trunk

cmdutils.c

@@ -27,6 +27,7 @@
 #include "cmdutils.h"
 #include "avstring.h"
 #include "version.h"
+#include "config.h"
 
 #undef exit