patch 8.1.2169: terminal flags are never reset

Problem:    Terminal flags are never reset.
Solution:   Reset the flags when setting 'term'.
diff --git a/src/version.c b/src/version.c
index 4f0e6fa..78d0dc9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2169,
+/**/
     2168,
 /**/
     2167,