* random.c (random_rand): suppress a warning.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30469 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

random.c

@@ -1053,7 +1053,7 @@ static VALUE
 random_rand(int argc, VALUE *argv, VALUE obj)
 {
     rb_random_t *rnd = get_rnd(obj);
-    VALUE vmax, beg = Qundef, end, v;
+    VALUE vmax, beg = Qundef, end = Qundef, v;
     int excl = 0;
 
     if (argc == 0) {