Correct a typing error

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@2146 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Image.py

@@ -210,7 +210,7 @@ or 'HTML'. Text can be automatically translated through the use of\
       """
         Alias for width
       """
-      return self.witdh()
+      return self.width()
 
     def getHeight(self):
       """