Fixed an aliasing bug in a builtin Sass function.

context.cpp

@@ -33,7 +33,6 @@ namespace Sass {
     register_function(rgb_descriptor,  rgb);
     register_function(rgba_4_descriptor, rgba_4);
     register_function(rgba_2_descriptor, rgba_2);
-    register_function(curse_descriptor, curse);
   }
   
 }
\ No newline at end of file

functions.cpp

@@ -32,13 +32,9 @@ namespace Sass {
     Function_Descriptor rgba_2_descriptor = 
     { "rgba", "$color", "$alpha", 0 };
     Node rgba_2(const vector<Token>& parameters, map<Token, Node>& bindings) {
-      return bindings[parameters[0]] << bindings[parameters[1]];
+      return bindings[parameters[0]].clone() << bindings[parameters[1]];
     }
     
-    extern const char* the_curse = "Damn!";
-    Function_Descriptor curse_descriptor = { "curse", 0 };
-    Node curse(const vector<Token>& parameters, map<Token, Node>& bindings) {
-      return Node(Node::identifier, 0, Token::make(the_curse, the_curse + std::strlen(the_curse)));
-    }
+    
   }
 }
\ No newline at end of file

functions.hpp

@@ -51,9 +51,6 @@ namespace Sass {
     
     extern Function_Descriptor rgba_2_descriptor;
     Node rgba_2(const vector<Token>& parameters, map<Token, Node>& bindings);
-    
-    extern Function_Descriptor curse_descriptor;
-    Node curse(const vector<Token>& parameters, map<Token, Node>& bindings);
   }
   
 }