patch 8.2.4471: Coverity warns for uninitialized variable

Problem:    Coverity warns for uninitialized variable.
Solution:   Set flags to zero.
diff --git a/src/version.c b/src/version.c
index ccd281a..1531a9c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4471,
+/**/
     4470,
 /**/
     4469,