rand: fix warnings: call to function ‘..’ without a real prototype from gcc 4.5

rand/isaac/rand.h

@@ -36,9 +36,9 @@ typedef  struct randctx  randctx;
  If (flag==TRUE), then use the contents of randrsl[0..RANDSIZ-1] as the seed.
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 */
-void randinit(/*_ randctx *r, word flag _*/);
+void randinit(randctx *r, word flag);
 
-void isaac(/*_ randctx *r _*/);
+void isaac(randctx *r);
 
 
 /*