patch 7.4.1633
Problem:    If the help tags file was removed "make install" fails. (Tony
            Mechelynck)
Solution:   Only try moving the file if it exists.
diff --git a/src/Makefile b/src/Makefile
index 5849266..e018811 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2115,11 +2115,11 @@
 		$(DEST_FTP) $(DEST_AUTO) $(DEST_AUTO)/xml $(DEST_PLUG) \
 		$(DEST_TUTOR) $(DEST_SPELL) $(DEST_COMP)
 	-$(SHELL) ./installman.sh install $(DEST_MAN) "" $(INSTALLMANARGS)
-	@echo generating help tags
 # Generate the help tags with ":helptags" to handle all languages.
 # Move the distributed tags file aside and restore it, to avoid it being
 # different from the repository.
-	cd $(HELPSOURCE); mv -f tags tags.dist
+	cd $(HELPSOURCE); if test -f tags; then mv -f tags tags.dist; fi
+	@echo generating help tags
 	-@cd $(HELPSOURCE); $(MAKE) VIMEXE=$(DEST_BIN)/$(VIMTARGET) vimtags
 	cd $(HELPSOURCE); \
 		files=`ls *.txt tags`; \
@@ -2129,7 +2129,7 @@
 		chmod $(HELPMOD) $$files
 	$(INSTALL_DATA)  $(HELPSOURCE)/*.pl $(DEST_HELP)
 	chmod $(SCRIPTMOD) $(DEST_HELP)/*.pl
-	cd $(HELPSOURCE); mv -f tags.dist tags
+	cd $(HELPSOURCE); if test -f tags.dist; then mv -f tags.dist tags; fi
 # install the menu files
 	$(INSTALL_DATA) $(SCRIPTSOURCE)/menu.vim $(SYS_MENU_FILE)
 	chmod $(VIMSCRIPTMOD) $(SYS_MENU_FILE)
diff --git a/src/version.c b/src/version.c
index bb75c11..3f45bd6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1633,
+/**/
     1632,
 /**/
     1631,