Fix error message for ArchiveView

While thinking about merging items, I realized that it is not necessary.
Just edit the mappings instead.

However, a fallout is an error function for the TreeView.

1 files changed, 1 insertions, 0 deletions

diff --git a/archiveview.h b/archiveview.h
index 850794c..540db29 100644
--- a/archiveview.h
+++ b/archiveview.h
@@ -74,6 +74,7 @@ class ArchiveTree : public SmTreeView {
         void rename();
 
     private:
+        void impossible(const QString msg = tr("Unable to perform function!"));
         ArchiveProxy *mProxy;
         ArchiveModel *mModel;
 };