Update NEWS

Author: jschueller

NEWS.md

@@ -20,7 +20,7 @@ in-progress
 
 * Fixed STOGO not registering new optimum ([#504])
 
-* Various minor bugfixes ([#570], [#563], [#379])
+* Various minor bugfixes ([#570], [#563], [#379], [#511])
 
 ## NLopt 2.8
 
@@ -521,6 +521,7 @@ in-progress
 [#504]: https://github.com/stevengj/nlopt/issues/504
 [#509]: https://github.com/stevengj/nlopt/issues/509
 [#510]: https://github.com/stevengj/nlopt/issues/510
+[#511]: https://github.com/stevengj/nlopt/issues/511
 [#528]: https://github.com/stevengj/nlopt/issues/528
 [#533]: https://github.com/stevengj/nlopt/issues/533
 [#534]: https://github.com/stevengj/nlopt/issues/534