Correct the lie in pg_config.h.win32 about having inttypes.h.

This lie has been harmless until now, but has been exposed by the
change to include postgres.h before the python headers, which
in some versions include inttypes.h if HAVE_INTTYPES_H is set.

src/include/pg_config.h.win32

@@ -4,7 +4,7 @@
 /* This file is generated from MingW ./configure, and with the following
  * changes to be valid for Visual C++ (and compatible):
  *
- * HAVE_CBRT, HAVE_FUNCNAME_FUNC, HAVE_GETOPT, HAVE_GETOPT_H,
+ * HAVE_CBRT, HAVE_FUNCNAME_FUNC, HAVE_GETOPT, HAVE_GETOPT_H, HAVE_INTTYPES_H,
  * HAVE_GETOPT_LONG, HAVE_LOCALE_T, HAVE_RINT, HAVE_STRINGS_H, HAVE_STRTOLL,
  * HAVE_STRTOULL, HAVE_STRUCT_OPTION, ENABLE_THREAD_SAFETY,
  * USE_INLINE, inline
@@ -185,7 +185,7 @@
 /* #undef HAVE_INT8 */
 
 /* Define to 1 if you have the <inttypes.h> header file. */
-#define HAVE_INTTYPES_H 1
+//#define HAVE_INTTYPES_H 1
 
 /* Define to 1 if you have the global variable 'int timezone'. */
 #define HAVE_INT_TIMEZONE