Fixed returns for async functions when there is only 1 return

Author: John Haley

generate/templates/partials/async_function.cc

@@ -90,14 +90,13 @@ void {{ cppClassName }}::{{ cppFunctionName }}Worker::HandleOKCallback() {
     Handle<v8::Value> to;
       {%if .|returnsCount > 1 %}
     Handle<Object> result = NanNew<Object>();
-      {%endif%}
-      {%each .|returnsInfo 0 1 as _return %}
-        {%partial convertToV8 _return %}
-        {%if .|returnsCount > 1 %}
+        {%each .|returnsInfo 0 1 as _return %}
+          {%partial convertToV8 _return %}
+          {%if .|returnsCount > 1 %}
     result->Set(NanNew<String>("{{ _return.returnNameOrName }}"), to);
-        {%endif%}
-      {%endeach%}
-      {%if .|returnsCount == 1 %}
+          {%endif%}
+        {%endeach%}
+      {%elsif .|returnsCount == 1 %}
     Handle<v8::Value> result = to;
       {%endif%}
     {%endif%}