[jdk17u-dev] RFR: 8283059: Uninitialized warning in check_code.c with GCC 11.2

[Roman Marchenko]

Backport JDK-8283059 to 17u
This is a better fix for GCC11's 'maybe-uninitialized' warning instead of JDK-8266168. 
Clean backport, no tier1 regression.

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Commit messages:
 - Backport d8893fad23d1ee6841336b96c34599643edb81ce

Changes: https://git.openjdk.org/jdk17u-dev/pull/724/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=724&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8283059
  Stats: 30 lines in 1 file changed: 9 ins; 0 del; 21 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/724.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/724/head:pull/724

PR: https://git.openjdk.org/jdk17u-dev/pull/724