Use buffer.getPath not @getPath in project

😬

spec/project-spec.coffee

@@ -72,6 +72,7 @@ describe "Project", ->
       expect(notification.getType()).toBe 'warning'
       expect(notification.getDetail()).toBe 'SomeError'
       expect(notification.getMessage()).toContain '`resurrect`'
+      expect(notification.getMessage()).toContain 'fixtures/dir/a'
 
   describe ".open(path)", ->
     [absolutePath, newBufferHandler] = []

src/project.coffee

@@ -338,7 +338,7 @@ class Project extends Model
       handle()
       atom.notifications.addWarning """
         Unable to read file after file `#{error.eventType}` event.
-        Make sure you have permission to access `#{@getPath()}`.
+        Make sure you have permission to access `#{buffer.getPath()}`.
         """,
         detail: error.message
         dismissable: true