Bug fix in analyzer command line to work with pub list

pkg/analyzer/lib/src/analyzer_impl.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer_impl;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'generated/constant.dart';
@@ skipping 232 matching lines @@
     // may be add package resolver
     {
       JavaFile packageDirectory;
       if (options.packageRootPath != null) {
         packageDirectory = new JavaFile(options.packageRootPath);
         resolvers.add(new PackageUriResolver([packageDirectory]));
       } else {
         PubPackageMapProvider pubPackageMapProvider =
             new PubPackageMapProvider(PhysicalResourceProvider.INSTANCE, sdk);
         PackageMapInfo packageMapInfo = pubPackageMapProvider.computePackageMap(
-            PhysicalResourceProvider.INSTANCE.getResource(''));
+            PhysicalResourceProvider.INSTANCE.getResource('.'));
         resolvers.add(
             new PackageMapUriResolver(
                 PhysicalResourceProvider.INSTANCE,
                 packageMapInfo.packageMap));
       }
     }
     sourceFactory = new SourceFactory(resolvers);
     context = AnalysisEngine.instance.createAnalysisContext();
     context.sourceFactory = sourceFactory;
     Map<String, String> definedVariables = options.definedVariables;
@@ skipping 137 matching lines @@
     }
   }
 
   @override
   void logInformation2(String message, Exception exception) {
     if (log) {
       stdout.writeln(message);
     }
   }
 }