New error message

git-svn-id: svn://10.0.0.236/trunk@252634 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/js/rhino/src/org/mozilla/javascript/resources/Messages.properties

@@ -593,6 +593,9 @@ msg.default.value =\
 msg.zero.arg.ctor =\
     Cannot load class "{0}" which has no zero-parameter constructor.
 
+duplicate.defineClass.name =\
+    Invalid method "{0}": name "{1}" is already in use.
+
 msg.ctor.multiple.parms =\
     Can''t define constructor or class {0} since more than one \
     constructor has multiple parameters.