[geary] Application.FolderStoreFactory: Fix critical on account removal

[Michael Gratton <mjog src gnome org>]

commit 3202a9c01804d6237967b52fb45632c40bd2af9e
Author: Michael Gratton <mike vee net>
Date:   Fri Mar 20 20:53:40 2020 +1100

    Application.FolderStoreFactory: Fix critical on account removal

 src/client/application/application-folder-store-factory.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/client/application/application-folder-store-factory.vala 
b/src/client/application/application-folder-store-factory.vala
index e68d0436..a419eaee 100644
--- a/src/client/application/application-folder-store-factory.vala
+++ b/src/client/application/application-folder-store-factory.vala
@@ -289,7 +289,7 @@ internal class Application.FolderStoreFactory : Geary.BaseObject {
             add_folders(available);
         }
         if (unavailable != null && !unavailable.is_empty) {
-            remove_folders(available);
+            remove_folders(unavailable);
         }
     }