RFR: 8286390: Address possibly lossy conversions in jdk.incubator.foreign moved to java.base [v2]

[Jorn Vernee]

> Address possible lossy conversion warning in `ProgrammableInvoker`.
> 
> Testing: `run-test-jdk_foreign`, testing with patch from https://github.com/openjdk/jdk/pull/8599 to see if the warning is gone.

Jorn Vernee has updated the pull request incrementally with one additional commit since the last revision:

  Use plain int cast instead

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8697/files
  - new: https://git.openjdk.java.net/jdk/pull/8697/files/da907697..d207f515

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8697&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8697&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8697.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8697/head:pull/8697

PR: https://git.openjdk.java.net/jdk/pull/8697