Hotfix for #389

lib/options/unitless-zero.js

@@ -25,7 +25,21 @@ module.exports = {
                     value.remove(1);
                 }
             } else if (value.is('percentage')) {
-                var number = value.first('number').content;
+                // XXX(tonyganch): There is a bug in Gonzales when in Less,
+                // percentage's content is not wrapped as an array but actually
+                // type of node's content is object. This bug has already been
+                // fixed in newer versions of Gonzales so the issue should be
+                // gone after update of dependencies and csscomb@4.0 release.
+                // This hack is here as a hotfix for csscomb@3.1 and must be
+                // removed once csscom@4.0 is released. See #389.
+                var number;
+                if (!Array.isArray(value.content) &&
+                    value.content.is('number')) {
+                    number = value.content;
+                } else {
+                    number = value.first('number').content;
+                }
+
                 if (number[0] === '0') {
                     value.type = 'number';
                     value.content = number;

test/options/unitless-zero-less/issue-389.less

@@ -0,0 +1,4 @@
+.test
+{
+    width: 100%;
+}

test/options/unitless-zero-less/test.js

@@ -0,0 +1,6 @@
+describe('options/unitless-zero (less)', function() {
+    it('Issue 389', function() {
+        this.comb.configure({ 'unitless-zero': true });
+        this.shouldBeEqual('issue-389.less');
+    });
+});