dont start yg if no offers

jmclient/jmclient/maker.py

@@ -23,6 +23,9 @@ class Maker(object):
         self.wallet = wallet
         self.nextoid = -1
         self.offerlist = self.create_my_orders()
+        if not self.offerlist:
+            #If we cannot create an offer at startup, quit
+            sys.exit(0)
         self.aborted = False
 
     def on_auth_received(self, nick, offer, commitment, cr, amount, kphex):

jmclient/jmclient/yieldgenerator.py

@@ -225,8 +225,8 @@ def ygmain(ygclass, txfee=1000, cjfee_a=200, cjfee_r=0.002, ordertype='swreloffe
             cjfee_a = int(options.cjfee)
         minsize = options.minsize
     else:
-        parser.error('You specified an incorrect order type which ' +\
+        parser.error('You specified an incorrect offer type which ' +\
-                     'can be either reloffer or absoffer')
+                     'can be either swreloffer or swabsoffer')
         sys.exit(0)
     nickserv_password = options.password