Cannot read property 'map' of null #8 fixed

Gruntfile.js

@@ -36,6 +36,14 @@ module.exports = function (grunt) {
                 files: {
                     'tmp/simple_concat/all.css': ['test/fixtures/style/all.css']
                 }
+            },
+            file_without_import: {
+                options: {
+
+                },
+                files: {
+                    'tmp/simple_concat/without_import.css': ['test/fixtures/style/without_import.css']
+                }
             }
         },
         // Unit tests.

tasks/util.js

@@ -12,7 +12,7 @@ var path = require('path');
  * @returns {Array}
  */
 function parseExtraCss(content) {
-	var matches = content.match(IMPORT_REG);
+	var matches = content.match(IMPORT_REG) || [];
 
 	return matches.map(function(importStr) {
 		var matches = importStr.match(PATH_REG);

test/css_import_test.js

@@ -11,6 +11,13 @@ exports.css_import = {
         var expected = grunt.file.read('test/expected/simple_concat/all.css');
         test.equal(actual, expected, 'This is a simple concat');
 
+        test.done();
+    },
+    file_without_import: function(test) {
+        var actual = grunt.file.read('tmp/simple_concat/without_import.css');
+        var expected = grunt.file.read('test/expected/simple_concat/without_import.css');
+        test.equal(actual, expected, 'This is a simple concat');
+
         test.done();
     }
 };

test/expected/simple_concat/without_import.css

@@ -0,0 +1,3 @@
+h1 {
+
+}

test/fixtures/style/without_import.css

@@ -0,0 +1,3 @@
+h1 {
+
+}