[jdk21u] RFR: 8318951: Additional negative value check in JPEG decoding

[Jayathirth D V]

This is jdk21u backport of https://bugs.openjdk.org/browse/JDK-8318951
It adds additional negative value checks in skip_input_data() function while decoding jpeg image.

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Commit messages:
 - Backport 75ce02fe74e1232bfa8d72b4fdad82ed938ef957

Changes: https://git.openjdk.org/jdk21u/pull/320/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=320&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318951
  Stats: 8 lines in 2 files changed: 8 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u/pull/320.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/320/head:pull/320

PR: https://git.openjdk.org/jdk21u/pull/320