fix: harden git status updates (#2533)

* fix for nil status error messages

* simplify logic

---------

Co-authored-by: Alexander Courtis <alex@courtis.org>

Author: hlmtre

lua/nvim-tree/explorer/node.lua

@@ -14,13 +14,15 @@ local function get_dir_git_status(parent_ignored, status, absolute_path)
     return { file = "!!" }
   end
 
-  return {
-    file = status.files and status.files[absolute_path],
-    dir = status.dirs and {
-      direct = status.dirs.direct[absolute_path],
-      indirect = status.dirs.indirect[absolute_path],
-    },
-  }
+  if status then
+    return {
+      file = status.files and status.files[absolute_path],
+      dir = status.dirs and {
+        direct = status.dirs.direct[absolute_path],
+        indirect = status.dirs.indirect[absolute_path],
+      },
+    }
+  end
 end
 
 local function get_git_status(parent_ignored, status, absolute_path)