Fix the 'compiler' package to generate correct code for MAKE_CLOSURE.

In the 2.5 development cycle, MAKE_CLOSURE as changed to take free
variables as a tuple rather than as individual items on the stack.
Closes patch #1534084.

Lib/test/test_compiler.py

@@ -104,6 +104,19 @@ class CompilerTest(unittest.TestCase):
         self.assertEquals(flatten([1, [2]]), [1, 2])
         self.assertEquals(flatten((1, (2,))), [1, 2])
 
+    def testNestedScope(self):
+        c = compiler.compile('def g():\n'
+                             '    a = 1\n'
+                             '    def f(): return a + 2\n'
+                             '    return f()\n'
+                             'result = g()',
+                             '<string>',
+                             'exec')
+        dct = {}
+        exec c in dct
+        self.assertEquals(dct.get('result'), 3)
+
+        
 NOLINENO = (compiler.ast.Module, compiler.ast.Stmt, compiler.ast.Discard)
 
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