fix cpp_vector_in_generator test by calling create_from_py_utility_code()...

fix cpp_vector_in_generator test by calling create_from_py_utility_code() early enough to let it inject Cython utility code

Cython/Compiler/Nodes.py

@@ -2758,6 +2758,15 @@ class DefNodeWrapper(FuncDefNode):
 
         self.signature = target_entry.signature
 
+        # This is only really required for Cython utility code at this time,
+        # everything else can be done during code generation.  But we expand
+        # all utility code here, simply because we cannot easily distinguish
+        # different code types.
+        for arg in self.args:
+            if not arg.type.is_pyobject:
+                if not arg.type.create_from_py_utility_code(env):
+                    pass # will fail later
+
     def signature_has_nongeneric_args(self):
         argcount = len(self.args)
         if argcount == 0 or (

tests/run/cpp_vector_in_generator.pyx

@@ -10,9 +10,3 @@ def stack_vector_in_generator(vector[int] vint):
     """
     for i in vint:
         yield i
-
-def vector_arg_in_function(py_v):
-    """
-    >>> print "Unneeded function with side effect."
-    """
-    cdef vector[int] v = py_v