hg: jdk/hs: 8189271: Metaspace::_capacity_until_GC should be size_t

[alexander.harlap at oracle.com]

Changeset: ebb3c01229b6
Author:    aharlap
Date:      2018-05-15 14:13 -0400
URL:       http://hg.openjdk.java.net/jdk/hs/rev/ebb3c01229b6

8189271: Metaspace::_capacity_until_GC should be size_t
Summary: small cleanup
Reviewed-by: stuefe, tschatzl

! src/hotspot/share/memory/metaspace.cpp
! src/hotspot/share/memory/metaspace.hpp