Stop compilation when Python headers are not present

Cython/Compiler/Code.py

@@ -236,7 +236,8 @@ class GlobalState(object):
         'before_global_var',
         'global_var',
         'all_the_rest',
-        'utility_code_def'
+        'utility_code_def',
+        'end'
     ]
     
 

Cython/Compiler/ModuleNode.py

@@ -425,7 +425,8 @@ class ModuleNode(Nodes.Node, Nodes.BlockNode):
             code.putln('#include "%s"' % filename)
         code.putln("#ifndef Py_PYTHON_H")
         code.putln("    #error Python headers needed to compile C extensions, please install development version of Python.")
-        code.putln("#endif")
+        code.putln("#else")
+        code.globalstate["end"].putln("#endif /* Py_PYTHON_H */")
         code.putln("#ifndef PY_LONG_LONG")
         code.putln("  #define PY_LONG_LONG LONG_LONG")
         code.putln("#endif")