auth: silence -Wparentheses warning

this change silences following warning:

warning: unnecessary parentheses in declaration of ‘os’ [-Wparentheses]
   std::ostringstream(os);
                     ^

Signed-off-by: Kefu Chai <kchai@redhat.com>
(cherry picked from commit b6fe1fec148cf5bcd9a8d780c993dbebc83b860d)

diff --git a/src/auth/KeyRing.cc b/src/auth/KeyRing.cc
index b8f5de5c3ea474bf8ed106059fa3828a8027b537..832cae0a346ba16add8ae2edc3057bfe0aeabb8e 100644 (file)
--- a/src/auth/KeyRing.cc
+++ b/src/auth/KeyRing.cc
@@ -128,7 +128,6 @@ void KeyRing::encode_plaintext(bufferlist& bl)
 
 void KeyRing::encode_formatted(string label, Formatter *f, bufferlist& bl)
 {
-  std::ostringstream(os);
   f->open_array_section(label.c_str());
   for (map<EntityName, EntityAuth>::iterator p = keys.begin();
        p != keys.end();