(_krb5_xlock): handle that everything was ok, and don't put an error

in the error strings then


git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@13390 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/krb5/fcache.c

@@ -87,6 +87,8 @@ _krb5_xlock(krb5_context context, int fd, krb5_boolean exclusive,
 	ret = EAGAIN;
 
     switch (ret) {
+    case 0:
+	break;
     case EINVAL: /* filesystem doesn't support locking, let the user have it */
 	ret = 0; 
 	break;