CF: move exception target assignment mark to right place, ticket #725

--HG--
extra : transplant_source : %F0%20%BAV%24%00%11%F5V%D9%E3%3C%8A%BC%9F5%22%A4%BD%8F

Cython/Compiler/FlowControl.py

@@ -959,10 +959,10 @@ class CreateControlFlowGraph(CythonTransform):
             else:
                 # TODO: handle * pattern
                 pass
-            if clause.target:
-                self.mark_assignment(clause.target)
             entry_point = self.flow.newblock(parent=self.flow.block)
             self.flow.nextblock()
+            if clause.target:
+                self.mark_assignment(clause.target)
             self.visit(clause.body)
             if self.flow.block:
                 self.flow.block.add_child(next_block)