don't start miners if no servers are defined

Switch.py

@@ -90,11 +90,7 @@ def updatable_miner(self):
 
 	def loop(self):
 		self.should_stop = False
-		if not self.servers:
-			print '\nAt least one server is required'
-			return
-		else:
-			self.set_server_index(0)
+		self.set_server_index(0)
 
 		while True:
 			if self.should_stop: return

poclbm.py

@@ -85,13 +85,14 @@ def socketwrap(family=socket.AF_INET, type=socket.SOCK_STREAM, proto=0):
 		for miner in BFLMiner.initialize(options):
 			switch.add_miner(miner)
 
-	for miner in switch.miners:
-		miner.start()
-
-	if switch.miners:
-		switch.loop()
-	else:
+	if not switch.servers:
+		print '\nAt least one server is required\n'
+	elif not switch.miners:
 		print '\nNothing to mine on, exiting\n'
+	else:
+		for miner in switch.miners:
+			miner.start()
+		switch.loop()
 except KeyboardInterrupt:
 	print '\nbye'
 finally: