Avoid warnings from clang

Sebastiano Merlino · Sebastiano Merlino · commit 8951cee05925 · 2014-05-11T23:41:14.000+01:00
diff --git a/src/httpserver/http_response_builder.hpp b/src/httpserver/http_response_builder.hpp
@@ -291,7 +291,7 @@ class http_response_builder
             return *this;
         }
 
-        friend struct http_response;
+        friend class http_response;
 };
 
 };
