RFR: 8255766: Fix linux+arm64 build after 8254072 [v2]

[Bernhard Urban-Forster]

> Fixing this problem:
> 
>  1501 | assert(StackOverflow::stack_shadow_zone_size() == (int)StackOverflow::stack_shadow_zone_size(), "must be same");
> Verified via a linux+arm64 slowdebug build and a windows+arm64 slowdebug build.

Bernhard Urban-Forster has updated the pull request incrementally with one additional commit since the last revision:

  use checked_cast utility

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1013/files
  - new: https://git.openjdk.java.net/jdk/pull/1013/files/30ef4190..5584ac72

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1013&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1013&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1013.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1013/head:pull/1013

PR: https://git.openjdk.java.net/jdk/pull/1013