Corrections on game 'pyramid'

- For TypeError reported with #147. (clickhandler failed to return a value)
- For index out of range (in pyramid.y)

pysollib/games/pyramid.py

@@ -82,8 +82,10 @@ class Pyramid_StackMethods:
     def _dropPairMove(self, n, other_stack, frames=-1, shadow=-1):
         if not self.game.demo:
             self.game.playSample("droppair", priority=200)
-        assert n == 1 and self.acceptsCards(
-            other_stack, [other_stack.cards[-1]])
+        if not (n == 1
+              and other_stack.cards
+              and self.acceptsCards(other_stack, [other_stack.cards[-1]])):
+           return
         old_state = self.game.enterState(self.game.S_FILL)
         f = self.game.s.foundations[0]
         self.game.moveMove(n, self, f, frames=frames, shadow=shadow)

pysollib/stack.py

@@ -2935,9 +2935,10 @@ class FaceUpWasteTalonStack(WasteTalonStack):
         self.game.fillStack(self)
 
     def dealCards(self, sound=False):
-        WasteTalonStack.dealCards(self, sound=sound)
+        retval = WasteTalonStack.dealCards(self, sound=sound)
         if self.canFlipCard():
             self.flipMove()
+        return retval
 
 
 class OpenTalonStack(TalonStack, OpenStack):