updated for version 7.3.449
Problem:    Crash when a BufWinLeave autocommand closes the only other window.
            (Daniel Hunt)
Solution:   Abort closing a buffer when it becomes the only one.
diff --git a/src/version.c b/src/version.c
index adb2a86..f4c7637 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    449,
+/**/
     448,
 /**/
     447,