run_switch.py: fix default --of_dir after being moved
diff --git a/run_switch.py b/run_switch.py
index 66e7837..382d109 100755
--- a/run_switch.py
+++ b/run_switch.py
@@ -10,7 +10,7 @@
 
 parser = OptionParser(version="%prog 0.1")
 parser.set_defaults(port_count=4)
-parser.set_defaults(of_dir="../../openflow")
+parser.set_defaults(of_dir="../openflow")
 parser.set_defaults(port=6633)
 parser.add_option("-n", "--port_count", type="int",
                   help="Number of veth pairs to create")