From 68733e465f3b67aaa6a0e72f774cefbf9e772eec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tor=20R=C3=B8ttum?= <tor@toringe.no>
Date: Mon, 28 Jul 2014 18:10:12 +0200
Subject: [PATCH] If CSS is empty, return empty string, fixes #16

---
 lib/shrink.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/shrink.js b/lib/shrink.js
index f95c7b9..2719fef 100644
--- a/lib/shrink.js
+++ b/lib/shrink.js
@@ -62,9 +62,14 @@ function traverseAST(ast) {
 }
 
 exports.shrink = function shrink(css) {
-  var ast = gonzo.parse(css);
-  ast = traverseAST(ast);
-  return gonzo.toCSS(ast);
+  if (css.trim()) {
+    var ast = gonzo.parse(css);
+    ast = traverseAST(ast);
+    return gonzo.toCSS(ast);
+  } else {
+    // if css is empty, just return empty string
+    return '';
+  }
 };
 
 exports.shrinkAST = function shrinkAST(ast) {