RFR: 8355711: Fix incorrect overflow check in RawBytecodeStream::raw_next

[Johan Sjölen]

Hi,

This fixes a typical wrong overflow check. `_bci` and `_next_bci` are both `int`, so any overflow is undefined, therefore an optimizing C++ compiler is allowed to remove this check. When looking at the x64 assembly for this, I could not find the check, so I guess that it was actually removed as well.

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Commit messages:
 - Correct integer overflow test

Changes: https://git.openjdk.org/jdk/pull/24920/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24920&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355711
  Stats: 4 lines in 1 file changed: 2 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24920.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24920/head:pull/24920

PR: https://git.openjdk.org/jdk/pull/24920