RFR: 8353329: Small memory leak when create GrowableArray with initial size 0

[Zhengyu Gu]

Please review this small fix to avoid 1 byte leak when create a GrowableArray with initial size = 0.

GrowableArray's c-heap allocator does not check size = 0 and os:malloc(0) will malloc at least 1 byte.

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Commit messages:
 - 8353329: Small memory leak when create GrowableArray with initial size 0

Changes: https://git.openjdk.org/jdk/pull/24341/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24341&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353329
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/24341.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24341/head:pull/24341

PR: https://git.openjdk.org/jdk/pull/24341