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/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,