Add back improperly removed #include for utils/dynamic_loader.h.

src/backend/utils/fmgr/dfmgr.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/fmgr/dfmgr.c,v 1.29 1999/07/16 05:23:23 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/fmgr/dfmgr.c,v 1.30 1999/07/16 23:05:45 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -18,6 +18,8 @@
 
 #include "postgres.h"
 
+#include "utils/dynamic_loader.h"
+
 #include "access/heapam.h"
 #include "catalog/catname.h"
 #include "catalog/pg_proc.h"