patch 7.4.1556
Problem:    "make install" changes the help tags file, causing it to differ
            from the repository.
Solution:   Move it aside and restore it.
diff --git a/src/version.c b/src/version.c
index 38d89c1..9c15aaf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1556,
+/**/
     1555,
 /**/
     1554,