Fix for FS#11856: In tagtree_buffer_event, do not wait for database to
come online as that may never happen.  Rather, wait until it either
has come online or has decided that this will never happen.  Added a
new function to tagcache.c to export this information.

---
 apps/tagcache.c |    4 ++++
 apps/tagcache.h |    1 +
 apps/tagtree.c  |    2 +-
 3 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/apps/tagcache.c b/apps/tagcache.c
index b3a16a3..50c6253 100644
--- a/apps/tagcache.c
+++ b/apps/tagcache.c
@@ -4746,6 +4746,10 @@ bool tagcache_is_initialized(void)
 {
     return tc_stat.initialized;
 }
+bool tagcache_is_fully_initialized(void)
+{
+    return tc_stat.readyvalid;
+}
 bool tagcache_is_usable(void)
 {
     return tc_stat.initialized && tc_stat.ready;
diff --git a/apps/tagcache.h b/apps/tagcache.h
index 4fffcca..8c09063 100644
--- a/apps/tagcache.h
+++ b/apps/tagcache.h
@@ -247,6 +247,7 @@ void tagcache_unload_ramcache(void);
 #endif
 void tagcache_init(void) INIT_ATTR;
 bool tagcache_is_initialized(void);
+bool tagcache_is_fully_initialized(void);
 bool tagcache_is_usable(void);
 void tagcache_start_scan(void);
 void tagcache_stop_scan(void);
diff --git a/apps/tagtree.c b/apps/tagtree.c
index 4673af3..fa88a59 100644
--- a/apps/tagtree.c
+++ b/apps/tagtree.c
@@ -659,7 +659,7 @@ static void tagtree_buffer_event(void *data)
 
     logf("be:%s", id3->path);
     
-    while (! tagcache_is_usable())
+    while (! tagcache_is_fully_initialized())
         yield();
 
     if (!tagcache_find_index(&tcs, id3->path))
-- 
1.7.1