Fixed a typo in the comment in Include/pyport.h (#425)

 #ifdef HAVE_DECLSPEC_DLL / #endif mismatch
diff --git a/Include/pyport.h b/Include/pyport.h
index 03c664f..684ef66 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -671,7 +671,7 @@
 #                               define PyMODINIT_FUNC __declspec(dllexport) PyObject*
 #                       endif /* __cplusplus */
 #               endif /* Py_BUILD_CORE */
-#       endif /* HAVE_DECLSPEC */
+#       endif /* HAVE_DECLSPEC_DLL */
 #endif /* Py_ENABLE_SHARED */
 
 /* If no external linkage macros defined by now, create defaults */