no necessary \ character

Author: SmileSmith

lib/processCss.js

@@ -100,7 +100,7 @@ var parserPlugin = postcss.plugin("css-loader-parser", function(options) {
 					if (item.name.indexOf('progid:DXImageTransform.Microsoft.AlphaImageLoader') >= 0){
 						delete item.innerSpacingBefore;
 						delete item.innerSpacingAfter;
-						var matchSrc = item.name.match(/src=[\'\"]([^\'\"]+)[\'\"]/);
+						var matchSrc = item.name.match(/src=['"]([^'"]+)['"]/);
 						if (!matchSrc) break;
 						var srcUrl = matchSrc[1];
 						if (options.url && !/^#/.test(srcUrl) && (isAlias(srcUrl) || loaderUtils.isUrlRequest(srcUrl, options.root))) {