Fix error stack trace

lib/errors.js

@@ -21,8 +21,8 @@ error.BaseError = function() {
   var tmp = Error.apply(this, arguments);
   tmp.name = this.name = 'SequelizeBaseError';
 
-  Error.captureStackTrace && Error.captureStackTrace(this, this.constructor);
   this.message = tmp.message;
+  Error.captureStackTrace && Error.captureStackTrace(this, this.constructor);
 };
 util.inherits(error.BaseError, Error);