patch 8.2.1043: %a item in 'statusline' not tested

Problem:    %a item in 'statusline' not tested.
Solution:   Add a test. (Dominique Pellé, closes #6318)
diff --git a/src/version.c b/src/version.c
index f4afb9a..cf2d868 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1043,
+/**/
     1042,
 /**/
     1041,