Add missing #include.

tglsfdc · tglsfdc · commit 9a9ba4c4d84e · 2020-06-04T17:57:19.000-04:00
Oversight in b2c64f5 (the later branches already have this). Per buildfarm.
diff --git a/src/include/utils/date.h b/src/include/utils/date.h
@@ -17,7 +17,7 @@
 #include <math.h>
 
 #include "fmgr.h"
-
+#include "datatype/timestamp.h"
 
 typedef int32 DateADT;
 
