rb_ary_dig, rb_hash_dig: nobody is using them outside.

mark them static.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63358 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

array.c

@@ -5828,7 +5828,7 @@ rb_ary_any_p(int argc, VALUE *argv, VALUE ary)
  *   [42, {foo: :bar}].dig(1, :foo)    #=> :bar
  */
 
-VALUE
+static VALUE
 rb_ary_dig(int argc, VALUE *argv, VALUE self)
 {
     rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);

hash.c

@@ -3065,7 +3065,7 @@ rb_hash_any_p(int argc, VALUE *argv, VALUE hash)
  *   g.dig(:foo, :bar)           #=> TypeError: no implicit conversion of Symbol into Integer
  */
 
-VALUE
+static VALUE
 rb_hash_dig(int argc, VALUE *argv, VALUE self)
 {
     rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);