Add appropriate headers for exit and printf.

Originally committed as revision 9268 to svn://svn.ffmpeg.org/ffmpeg/trunk

cws2fws.c

@@ -8,6 +8,8 @@
 
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 #include <zlib.h>