better slug and options processing for createMulter

lib/site-controller.js

@@ -37,8 +37,12 @@ class SiteController extends SiteCommon {
   }
 
   createMulter (slug, options) {
-    slug = slug || 'uploads';
+    if (!!slug && (typeof slug === 'object')) {
-
+      options = slug;
+      slug = this.component.slug;
+    } else {
+      slug = slug || this.component.slug;
+    }
     options = Object.assign({
       dest: `/tmp/${this.dtp.config.site.domainKey}/${slug}/${this.component.slug}`
     }, options || { });