Fix bug with dividend reading when block is not downloaded yet

src/cutecoin/core/community.py

@@ -142,7 +142,7 @@ class Community(QObject):
         :return: The computed UD or 1 if no UD was generated.
         """
         block = self.get_ud_block()
-        if block:
+        if block and block != qtbma.blockchain.Block.null_value:
             return math.ceil(
                 max(
                     self.dividend,

src/cutecoin/core/money/relative.py

@@ -25,8 +25,7 @@ class Relative():
 
     def value(self):
         """
-        Return relaive value of amount
-    type
+        Return relative value of amount
         :param int amount:   Value
         :param cutecoin.core.community.Community community: Community instance
         :return: float