patch 8.2.2181: valgrind warnings for using uninitialized value

Problem:    Valgrind warnings for using uninitialized value.
Solution:   Do not use "start" or "end" unless there is a match.
diff --git a/src/version.c b/src/version.c
index 07edd0c..04951e4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2181,
+/**/
     2180,
 /**/
     2179,