fixed st00pid typo

oec/core.py

@@ -67,7 +67,7 @@
             if not success:
                 message, sent_item = info
                 sys.stderr.write("*" * 35)
-                sys.strderr.write(_("OpenERP Error message:"))
+                sys.stderr.write(_("OpenERP Error message:"))
                 sys.stderr.write(message)
                 sys.stderr.write("-" * 35)
                 sys.stderr.write(sent_item)