[jdk19] RFR: 8288769: Revert unintentional change to deflate.c

[Lance Andersen]

Hi,

Please review this patch to deflate.c which reverts an unintentional change  that was part of  JDK-8284371, which reverted the reworking of (7) deflate.c undo (6), replaced withe the official zlib repo fix see#305/#f969409 

Mach5 tiers1-3 have been run without failure

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Commit messages:
 - Fix for JDK-8288769

Changes: https://git.openjdk.org/jdk19/pull/159/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk19&pr=159&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8288769
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk19/pull/159.diff
  Fetch: git fetch https://git.openjdk.org/jdk19 pull/159/head:pull/159

PR: https://git.openjdk.org/jdk19/pull/159