fixed error in function for rounder extension

extensions/fablabchemnitz_rounder.py

@@ -104,7 +104,7 @@ class svgRounder(inkex.Effect):
     def opacity_round_it(self, node, typeOpacity):
         if node.tag == inkex.addNS('g','svg'):
             for e in node:
-                self.opacity_round_it(e)
+                self.opacity_round_it(e, typeOpacity)
         else:
             style = node.get('style')
             if style:
@@ -157,4 +157,4 @@ class svgRounder(inkex.Effect):
                 self.opacity_round_it(node, "fill-opacity")
 
 if __name__ == '__main__':
-    svgRounder().run()
+    svgRounder().run()