Resolve OTP 19 compatibility

Dialyzer issues otherwise

include/leveled.hrl

@@ -34,7 +34,7 @@
                          end_key :: tuple() | undefined,
                          owner :: pid()|list(),
                          filename :: string() | undefined,
-                         bloom :: binary() | none}).
+                         bloom :: binary() | none | undefined}).
 
 -record(cdb_options,
                         {max_size :: integer() | undefined,

src/leveled_ebloom.erl

@@ -560,7 +560,7 @@ test_bloom(N, Runs) ->
         fun(HashList) -> 
             HitOrMissFun = 
                 fun (Entry, {HitL, MissL}) ->
-                    case random:uniform() < 0.5 of
+                    case leveled_rand:uniform() < 0.5 of
                         true -> 
                             {[Entry|HitL], MissL};
                         false ->