Review request for JDK-8021398: j.l.r.Parameter.getAnnotatedType().getType() for not annotated use of type returns null

[Eric McCorkle]

Hello, please review this simple patch which fixes a problem in the type
annotations handling API.  This manifests as a problem with both
j.l.r.Parameter.getAnnotatedType().getType() as well as
j.l.r.Executable.getAnnotatedParameterTypes().getType().

The webrev is here:
http://cr.openjdk.java.net/~emc/8021398/

The bug report is here:
https://bugs.openjdk.java.net/browse/JDK-8021398

Thanks,
Eric