Add _XOPEN_SOURCE #define. This is necessary for (s)random(), which are XSI

extensions of POSIX. Avoids implicit declaration warnings on some systems.

Originally committed as revision 18178 to svn://svn.ffmpeg.org/ffmpeg/trunk

tools/trasher.c

@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#define _XOPEN_SOURCE 600
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>