change default not tot create useless object

initheader = initheader ? initheader.dup : {}

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46678 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/net/http.rb

@@ -1123,7 +1123,7 @@ module Net   #:nodoc:
     #       end
     #     }
     #
-    def get(path, initheader = {}, dest = nil, &block) # :yield: +body_segment+
+    def get(path, initheader = nil, dest = nil, &block) # :yield: +body_segment+
       res = nil
       request(Get.new(path, initheader)) {|r|
         r.read_body dest, &block