patch 8.1.0392: error while typing :/foo/s// with 'incsearch' enabled

Problem:    Error while typing :/foo/s// with 'incsearch' enabled.
Solution:   Do not give search errors when highlighting matches.
diff --git a/src/version.c b/src/version.c
index 3a2b065..d04bdab 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    392,
+/**/
     391,
 /**/
     390,