Don't use an uninitialised variable.

A compiler is well within its rights to throw this value away completely (and clang does so).

See http://kqueue.org/blog/2012/06/25/more-randomness-or-less/

srandomdev.c

@@ -77,8 +77,7 @@ srandomdev(void)
 		{
 
                 gettimeofday(&tv, NULL);
-                /* NOTE: intentional use of uninitialized variable */
-                seed ^= (getpid() << 16) ^ tv.tv_sec ^ tv.tv_usec;
+                seed = (getpid() << 16) ^ tv.tv_sec ^ tv.tv_usec;
         }
         srandom(seed);
 }