some additional checks

wichteln.py

@@ -38,6 +38,9 @@ class Wichtelee(object):
     def isReceiver(self):
         return self.giverName
 
+    def isGiver(self):
+        return self.receiverName
+
     def inform(self):
         infoLine = "{0} -> {1}".format(self.name, self.receiverName)
         global notarMsg 
@@ -80,7 +83,14 @@ wichtelees = [
 ]
 
 
+
 for first in wichtelees:
+    if DEBUG:
+        print("Handling {}".format(first.name))
+    if first.isGiver():
+        if DEBUG:
+            print("Is already giver, skip over")
+        continue
     checked = []
     while True:
         n = random.randint(0, len(wichtelees)-1)