[jdk11u-dev] RFR: 8298093: improve cleanup and error handling of awt_parseColorModel in awt_parseImage.c

[Matthias Baesken]

8298093: improve cleanup and error handling of awt_parseColorModel in awt_parseImage.c

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Commit messages:
 - Backport 98fa48c330941efe6588a907b383802a11ed0e6b

Changes: https://git.openjdk.org/jdk11u-dev/pull/1655/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1655&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298093
  Stats: 22 lines in 1 file changed: 14 ins; 1 del; 7 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1655.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1655/head:pull/1655

PR: https://git.openjdk.org/jdk11u-dev/pull/1655