adapt to API change in PostgreSQL 9.6

Markus Nullmeier · Markus Nullmeier · commit 67a4d04cd389 · 2017-04-11T20:29:48.000+02:00
diff --git a/init.c b/init.c
@@ -24,6 +24,10 @@
 #include "access/htup_details.h"
 #include "access/heapam.h"
 
+#if PG_VERSION_NUM >= 90600
+#include "nodes/extensible.h"
+#endif
+
 #include "point.h"
 #include "crossmatch.h"
 
