Fixed typo in exception type

Author: etanzapinsky

of_client/pox_client.py

@@ -378,7 +378,7 @@ def send_to_switch(self,packet):
         ## HANDLE PACKETS SEND ON LINKS THAT HAVE TIMED OUT
         try:
             self.switches[switch]['connection'].send(msg)
-        except Runtimerror, e:
+        except RuntimeError, e:
             print "ERROR:send_to_switch: %s to switch %d" % (str(e),switch)
             # TODO - ATTEMPT TO RECONNECT SOCKET
         except KeyError, e: