fix bug when path was nil

lib/rack/livereload.rb

@@ -48,7 +48,7 @@ module Rack
       else
         status, headers, body = @app.call(env)
 
-        if !@options[:ignore] || !@options[:ignore].any? { |filter| path[filter] }
+        if !@options[:ignore] || !@options[:ignore].any? { |filter| env['PATH_INFO'][filter] }
           case headers['Content-Type']
           when %r{text/html}
             content_length = 0

spec/rack/livereload_spec.rb

@@ -135,12 +135,23 @@ describe Rack::LiveReload do
 
     context 'ignored' do
       let(:options) { { :ignore => [ %r{file} ] } }
-      let(:env) { { 'PATH_INFO' => 'this/file' } }
+
+      context 'not root' do
+        let(:env) { { 'PATH_INFO' => '/this/file' } }
 
         it 'should have no change' do
           body.should_not include('script')
         end
       end
+
+      context 'root' do
+        let(:env) { { 'PATH_INFO' => '/' } }
+
+        it 'should have script' do
+          body.should include('script')
+        end
+      end
+    end
   end
 
   context '/__rack/livereload.js' do