Build scanner output when making a distribution.

src/bin/psql/Makefile

@@ -5,7 +5,7 @@
 # Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
 # Portions Copyright (c) 1994, Regents of the University of California
 #
-# $PostgreSQL: pgsql/src/bin/psql/Makefile,v 1.39 2004/02/19 19:40:08 tgl Exp $
+# $PostgreSQL: pgsql/src/bin/psql/Makefile,v 1.40 2004/03/09 19:47:05 petere Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -46,7 +46,7 @@ else
 	@$(missing) flex $< $@
 endif
 
-distprep: $(srcdir)/sql_help.h
+distprep: $(srcdir)/sql_help.h $(srcdir)/psqlscan.c
 
 install: all installdirs
 	$(INSTALL_PROGRAM) psql$(X) $(DESTDIR)$(bindir)/psql$(X)