patch 8.1.1572: compiler warnings with tiny build

Problem:    Compiler warnings with tiny build. (Tony Mechelynck)
Solution:   Add #ifdef.
diff --git a/src/version.c b/src/version.c
index 19b6aa7..62ef113 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1572,
+/**/
     1571,
 /**/
     1570,