lib/vmail.vim in vmail-1.8.0 vs lib/vmail.vim in vmail-1.8.1

@@ -571,11 +571,13 @@
   echo a:command
   let res = system(a:command)
 
   let previous_winnr = winnr()
   split compose_message.txt
-  exec previous_winnr . "wincmd w"
-  close!
+  if winnr('$') > 1
+    exec previous_winnr . "wincmd w"
+    close!
+  end
 
   setlocal modifiable
   " TODO maybe later save backups?
   setlocal buftype=nowrite
   silent 1,$delete