Use helm-projectile directly (fixes #352)

core/prelude-editor.el

@@ -289,13 +289,7 @@ Will only occur if prelude-whitespace is also enabled."
   (interactive)
   (condition-case nil
     (if (projectile-project-root)
-        ;; add project files and buffers when in project
-        (helm-other-buffer '(helm-c-source-projectile-files-list
-                             helm-c-source-projectile-buffers-list
-                             helm-c-source-buffers-list
-                             helm-c-source-recentf
-                             helm-c-source-buffer-not-found)
-                           "*helm prelude*")
+        (helm-projectile)
       ;; otherwise fallback to helm-mini
       (helm-mini))
     ;; fall back to helm mini if an error occurs (usually in projectile-project-root)