patch 8.1.1413: error when the drive of the swap file was disconnected

Problem:    Error when the drive of the swap file was disconnected.
Solution:   Try closing and re-opening the swap file. (closes #4378)
diff --git a/src/version.c b/src/version.c
index d522141..240aa70 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1413,
+/**/
     1412,
 /**/
     1411,