[Bug_Fix] shortcut to directory in .link files caused crash

since the plugin browser is now closed when running plugins
rb->set_current_file() had no valid browser context and used 'random' memory
instead

also adds a way to discard levels so we can load the desired directory
instead of returning to the previous

https://forums.rockbox.org/index.php/topic,54694.0.html

Change-Id: I624246e56d42972bf6a1ce566a209b745de6f30b

1 files changed, 4 insertions, 1 deletions

diff --git a/apps/tree.h b/apps/tree.h
index d454c0f7ee..d13c75d434 100644
--- a/apps/tree.h
+++ b/apps/tree.h
@@ -90,9 +90,12 @@ struct tree_context {
     int currtable; /* db use */
     int currextra; /* db use */
 #endif
+    int sort_dir; /* directory sort order */
+    int out_of_tree; /* shortcut from elsewhere */
     struct tree_cache cache;
     bool dirfull;
-    int sort_dir; /* directory sort order */
+    bool is_browsing; /* valid browse context? */
+
     struct browse_context *browse;
 };