RFR: JDK-8313164: src/java.desktop/windows/native/libawt/windows/awt_Robot.cpp GetRGBPixels adjust releasing of resources

Wed Jul 26 10:50:05 UTC 2023

In src/java.desktop/windows/native/libawt/windows/awt_Robot.cpp GetRGBPixels we release some resources at the end of the function by calling DeleteObject/DeleteDC. This is recommended by the MS API docs.
However this should be done as well in some early leaving with throw that can occur in this function.

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Commit messages:
 - JDK-8313164

Changes: https://git.openjdk.org/jdk/pull/15038/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15038&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8313164
  Stats: 13 lines in 1 file changed: 10 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/15038.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15038/head:pull/15038

PR: https://git.openjdk.org/jdk/pull/15038