Make random a generic so it can still be called on integers

basis/random/random-tests.factor

@@ -29,7 +29,7 @@ IN: random.tests
 [ { 1 2 } 3 sample ] [ too-many-samples?  ] must-fail-with
 
 [ 3 ] [ { 1 2 3 4 } 3 sample prune length ] unit-test
-[ 99 ] [ 100 99 sample prune length ] unit-test
+[ 99 ] [ 100 iota 99 sample prune length ] unit-test
 
 [ ]
 [ [ 100 random-bytes ] with-system-random drop ] unit-test

basis/random/random.factor

@@ -50,7 +50,11 @@ PRIVATE>
 : random-bits* ( numbits -- n )
     1 - [ random-bits ] keep set-bit ;
 
-: random ( seq -- elt )
+GENERIC: random ( obj -- elt )
+
+M: integer random random-integer ;
+
+M: sequence random
     [ f ] [
         [ length random-integer ] keep nth
     ] if-empty ;