patch 8.2.1051: crash when changing a list while using reduce() on it

Problem:    Crash when changing a list while using reduce() on it.
Solution:   Lock the list. (closes #6330)
diff --git a/src/version.c b/src/version.c
index ba3e621..36da620 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1051,
+/**/
     1050,
 /**/
     1049,