Ruby2.0: remove "warning: class variable access from toplevel" in lib/plugins/rfpdf/lib/tcpdf.rb (#13338, #13329)

Contributed by Jun NAITOH.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11527 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/plugins/rfpdf/lib/tcpdf.rb

@@ -39,9 +39,6 @@ require 'core/rmagick'
 # @package com.tecnick.tcpdf
 #
  
-@@version = "1.53.0.TC031"
-@@fpdf_charwidths = {}
-
 PDF_PRODUCER = 'TCPDF via RFPDF 1.53.0.TC031 (http://tcpdf.sourceforge.net)'
 
 module TCPDFFontDescriptor
@@ -79,6 +76,9 @@ class TCPDF
     Rails.logger
   end
 
+  @@version = "1.53.0.TC031"
+  @@fpdf_charwidths = {}
+
   cattr_accessor :k_cell_height_ratio
   @@k_cell_height_ratio = 1.25