Check if schema is empty, if so do nothing

Author: davidlgj

src/directives/schema-form.js

@@ -77,7 +77,7 @@ function($compile,  schemaForm,  schemaFormDecorators){
         var form   = scope.initialForm || ['*'];
 
         //The check for schema.type is to ensure that schema is not {}
-        if (form && schema && schema.type && (lastDigest.form !== form || lastDigest.schema !== schema)) {
+        if (form && schema && schema.type && (lastDigest.form !== form || lastDigest.schema !== schema) && Object.keys(schema.properties).length > 0) {
           lastDigest.schema = schema;
           lastDigest.form = form;