patch 8.2.4991: no test for hwat patch 8.1.0535 fixes

Problem:    No test for hwat patch 8.1.0535 fixes.
Solution:   Add a test. (closes #10462)
diff --git a/src/version.c b/src/version.c
index 6cb825c..bde9fe8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4991,
+/**/
     4990,
 /**/
     4989,