patch 7.4.1553
Problem:    ":runtime" does not use 'packpath'.
Solution:   Add "what" argument.
diff --git a/src/version.c b/src/version.c
index d77d480..ed6e4b2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1553,
+/**/
     1552,
 /**/
     1551,