fixed bug 5662 - imap failed to discover folders and downloading mail messages; fixed memory leaks when building message URI; r=mscott, a=chofmann

mailnews/local/src/nsLocalUtils.cpp

@@ -328,9 +328,9 @@ nsresult nsBuildLocalMessageURI(const char *baseURI, PRUint32 key, char** uri)
 	if (tailURI.Find(kMailboxRootURI) == 0)
 		tailURI.Cut(0, PL_strlen(kMailboxRootURI));
   
-  const char *tail = tailURI.ToNewCString();
+	char *tail = tailURI.ToNewCString();
 
 	*uri = PR_smprintf("%s%s#%d", kMailboxMessageRootURI, tail, key);
-  
+	delete[] tail;
 	return NS_OK;
 }