git: openjdk/panama-foreign: foreign-jextract: Fix Cstring not to call withSize on already bound addresses

[Maurizio Cimadamore]

Changeset: a8c11cf6
Author:    Maurizio Cimadamore <mcimadamore at openjdk.org>
Date:      2020-04-20 11:37:50 +0000
URL:       https://git.openjdk.java.net/panama-foreign/commit/a8c11cf6

Fix Cstring not to call withSize on already bound addresses

Reviewed-by: jvernee

! src/jdk.incubator.jextract/share/classes/jdk/incubator/jextract/tool/resources/Cstring.java.template
! test/jdk/java/foreign/Cstring.java