Despite what some people believe there is no such thing

as <malloc.h> in the C language nowadays.

modules/db_postgres/pg_con.c

@@ -44,7 +44,7 @@
 #include "../../dprint.h"
 #include "../../ut.h"
 
-#include <malloc.h>
+#include <stdlib.h>
 #include <string.h>
 #include <netinet/in.h>
 #include <time.h>

modules/db_postgres/pg_oid.c

@@ -41,7 +41,7 @@
 #include "../../dprint.h"
 #include "../../ut.h"
 #include <strings.h>
-#include <malloc.h>
+#include <stdlib.h>
 #include <string.h>
 
 /** An array of supported PostgreSQL field types. */