[jdk8u-dev] RFR: 8334905: [8u] The test java/awt/Mixing/AWT_Mixing/JButtonOverlapping.java started to fail after 8159690

[Sergey Bylokhov]

The missed line in the test is restored.

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Commit messages:
 - 8334905: [8u] The test java/awt/Mixing/AWT_Mixing/JButtonOverlapping.java started to fail after 8159690

Changes: https://git.openjdk.org/jdk8u-dev/pull/525/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=525&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334905
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/525.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/525/head:pull/525

PR: https://git.openjdk.org/jdk8u-dev/pull/525