patch 8.2.4851: compiler warning for uninitialized variable

Problem:    Compiler warning for uninitialized variable.
Solution:   Use another variable to decide to restore option values.
diff --git a/src/version.c b/src/version.c
index 0e08c29..7b36e62 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4851,
+/**/
     4850,
 /**/
     4849,