PDF: fix the problem that TCPDF built-in font breaks in the Windows (#61).

This problem occurs because the EOF character string is included in the built-in font.

Contributed by Jun NAITOH.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@5290 e93f8b46-1217-0410-a6f0-8f06a7374b81

vendor/plugins/rfpdf/lib/tcpdf.rb

@@ -3063,7 +3063,7 @@ class TCPDF
 			out('/Filter /FlateDecode');
 		end
 		out('>>');
-    open(ctgfile) do |f|
+    open(ctgfile, "rb") do |f|
       putstream(f.read())
     end
 		out('endobj');