Protect pyconfig.h from multiple inclusions.
diff --git a/pyconfig.h.in b/pyconfig.h.in
index a8bede8..a6f7e83 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -1,5 +1,10 @@
/* pyconfig.h.in. Generated from configure.in by autoheader. */
+
+#ifndef Py_PYCONFIG_H
+#define Py_PYCONFIG_H
+
+
/* Define for AIX if your compiler is a genuine IBM xlC/xlC_r and you want
support for AIX C++ shared extension modules. */
#undef AIX_GENUINE_CPLUSPLUS
@@ -852,3 +857,5 @@
#define STRICT_SYSV_CURSES /* Don't use ncurses extensions */
#endif
+#endif /*Py_PYCONFIG_H*/
+