remove validation machinery so that discard_block works for integer

and floating-point base engine


[SVN r15657]

libs/random

@@ -1 +1 @@
-Subproject commit 9444accc6a0f6e7ab1587d3168e6b64bfa515daf
+Subproject commit 63825754bebf4eaa9bba07e1260cbfc31f5d2315