[Bugs] #2543 UNSP: Show does not accept numeric input

[Sugar Labs Bugs]

#2543: Show does not accept numeric input
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    Reporter:  tonyforster                |          Owner:  walter                     
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  Turtleart                  |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:                             
Status_field:  Unconfirmed                |   Distribution:  Unspecified                
   Seeta_dev:                             |  
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 Traceback (most recent call last):
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/talogo.py",
 line 840, in doevalstep
     self.step.next()
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/talogo.py",
 line 820, in _evalsym
     result = self.cfun.fcn(self, *self.arglist)
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/talogo.py",
 line 438, in <lambda>
     'show': [1, lambda self, x: self._show(x, True)],
   File "/home/olpc/Activities/TurtleArt.activity/TurtleArt/talogo.py",
 line 1371, in _show
     y -= self.tw.canvas.textsize
 UnboundLocalError: local variable 'y' referenced before assignment

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Ticket URL: <http://bugs.sugarlabs.org/ticket/2543>
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