bug：修复不存在类名时，抛出警告的问题

Author: wujr5

atomcss-loader.js

@@ -117,9 +117,9 @@ module.exports = function(sSource) {
     sHtmlString = sSource.match(/<template>([\s\S]*)<\/template>/g);
 
     // html 文本需要特殊处理
-    sClassString = sPugString ? sPugString[0] : '.' + sHtmlString[0].match(/class=("|')([a-zA-Z0-9 \- _]*)("|')/ig).map(item => item.replace(/class=('|")|("|')/g, '').split(' ').join('.')).join('.');
+    sClassString = sPugString ? sPugString[0] : '.' + (sHtmlString[0].match(/class=("|')([a-zA-Z0-9 \- _]*)("|')/ig) || []).map(item => item.replace(/class=('|")|("|')/g, '').split(' ').join('.')).join('.');
   } catch (e) {
-    console.log(e);
+    console.warn(e);
     return sSource;
   }
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "vue-atomcss-loader",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "",
   "homepage": "https://github.com/wujr5/vue-atomcss-loader",
   "repository": {