PDF: nil safe at fix_text_encoding(txt) of lib/redmine/export/pdf.rb.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@5345 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/lib/redmine/export/pdf_test.rb

@@ -20,6 +20,13 @@ require File.expand_path('../../../../../test_helper', __FILE__)
 class PdfTest < ActiveSupport::TestCase
   include Redmine::I18n
 
+  def test_fix_text_encoding_nil
+    set_language_if_valid 'ja'
+    pdf = Redmine::Export::PDF::IFPDF.new('ja')
+    assert pdf
+    assert_equal '', pdf.fix_text_encoding(nil)
+  end
+
   def test_fix_text_encoding_backslash_ascii
     set_language_if_valid 'ja'
     pdf = Redmine::Export::PDF::IFPDF.new('ja')