Bug 579297 warning: unused variable 'rv' in nsXBLDocGlobalObject::GetPrincipal()

r=neil

--HG--
extra : rebase_source : 517a30580b8469f6120a5e8fc4accf900111e1a0

content/xbl/src/nsXBLDocumentInfo.cpp

@@ -401,7 +401,6 @@ nsXBLDocGlobalObject::SetScriptsEnabled(PRBool aEnabled, PRBool aFireTimeouts)
 nsIPrincipal*
 nsXBLDocGlobalObject::GetPrincipal()
 {
-  nsresult rv = NS_OK;
   if (!mGlobalObjectOwner) {
     // XXXbz this should really save the principal when
     // ClearGlobalObjectOwner() happens.