patch 8.1.1472: add_termcap_entry() is not tested

Problem:    Add_termcap_entry() is not tested.
Solution:   Add a simple test.
diff --git a/src/version.c b/src/version.c
index 366e56b..ca2e174 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1472,
+/**/
     1471,
 /**/
     1470,