Fix argument name usage in finally blocks (GH-3713)

Fixes #3712 (hopefully) by reverting a small part of bbef4d74

Cython/Compiler/FlowControl.py

@@ -1198,6 +1198,7 @@ class ControlFlowAnalysis(CythonTransform):
         if self.flow.loops:
             self.flow.loops[-1].exceptions.append(descr)
         self.flow.block = body_block
+        body_block.add_child(entry_point)
         self.flow.nextblock()
         self._visit(node.body)
         self.flow.exceptions.pop()

tests/compile/tryfinally.pyx

@@ -18,4 +18,11 @@ def f(a, b, c, x):
         finally:
             i = 42
 
+def use_name_in_finally(name):
+    # GH3712
+    try:
+        []
+    finally:
+        name()
+