Cleanup of header files for python extensions.

- combine py_foo_proto.h and py_foo.h
 - move #include of Python.h into one place so we can get rid of that
   annoying compiler warning about HAVE_FSTAT being redefined
(This used to be commit 0659351b25)

source3/python/py_spoolss_printerdata.c

@@ -19,6 +19,7 @@
 */
 
 #include "python/py_spoolss.h"
+#include "python/py_conv.h"
 
 static BOOL py_from_printerdata(PyObject **dict, char *key, char *value,
 				uint16 data_type, uint8 *data,