[ruby/rexml] Fix crash with nil XPath variables (#13)

Patch by Alyssa Ross. Thanks!!!
https://github.com/ruby/rexml/commit/2a53c54f58

1 files changed, 1 insertions, 4 deletions

diff --git a/lib/rexml/functions.rb b/lib/rexml/functions.rb
index 219f9c8db5..9c226d2cdf 100644
--- a/lib/rexml/functions.rb
+++ b/lib/rexml/functions.rb
@@ -135,8 +135,7 @@ module REXML
     #
     # An object of a type other than the four basic types is converted to a
     # string in a way that is dependent on that type.
-    def Functions::string( object=nil )
-      object = @@context[:node] if object.nil?
+    def Functions::string( object=@@context[:node] )
       if object.respond_to?(:node_type)
         case object.node_type
         when :attribute
@@ -165,8 +164,6 @@ module REXML
               object.to_s
             end
           end
-        when nil
-          ""
         else
           object.to_s
         end