Merge pull request mvidner#67 from plassa-b/master

Replaced Fixnum by Integer for Ruby2.4

Author: mvidner

lib/dbus/marshall.rb

@@ -296,7 +296,7 @@ def struct
     def append(type, val)
       raise TypeException, "Cannot send nil" if val.nil?
 
-      type = type.chr if type.is_a?(Fixnum)
+      type = type.chr if type.is_a?(Integer)
       type = Type::Parser.new(type).parse[0] if type.is_a?(String)
       case type.sigtype
       when Type::BYTE

lib/dbus/message.rb

@@ -126,7 +126,7 @@ def reply_to(m)
 
     # Add a parameter _val_ of type _type_ to the message.
     def add_param(type, val)
-      type = type.chr if type.is_a?(Fixnum)
+      type = type.chr if type.is_a?(Integer)
       @signature += type.to_s
       @params << [type, val]
     end