RFR: JDK-8276809: java/awt/font/JNICheck/FreeTypeScalerJNICheck.java shows JNI warning on Windows [v2]

[Matthias Baesken]

> The new test java/awt/font/JNICheck/FreeTypeScalerJNICheck.java introduced with https://bugs.openjdk.java.net/browse/JDK-8269223 adds -Xcheck:jni to an awt related test, and shows on Windows server 2019 the following JNI warning , so the test  JNICheck/FreeTypeScalerJNICheck.java fails on this Windows version.
> 
> :stdErr:
> Thu Oct 28 01:27:10 CEST 2021
> stdout: [WARNING in native method: JNI call made without checking exceptions when required to from CallStaticVoidMethodV
>                at sun.awt.Win32GraphicsEnvironment.initDisplay(java.desktop at 18.0.0.1-internal/Native Method)
>                at sun.awt.Win32GraphicsEnvironment.initDisplayWrapper(java.desktop at 18.0.0.1-internal/Win32GraphicsEnvironment.java:95)
>                at sun.awt.Win32GraphicsEnvironment.<clinit>(java.desktop at 18.0.0.1-internal/Win32GraphicsEnvironment.java:63)
>                at sun.awt.PlatformGraphicsInfo.createGE(java.desktop at 18.0.0.1-internal/PlatformGraphicsInfo.java:34)
>                at java.awt.GraphicsEnvironment$LocalGE.createGE(java.desktop at 18.0.0.1-internal/GraphicsEnvironment.java:93)
>                at java.awt.GraphicsEnvironment$LocalGE.<clinit>(java.desktop at 18.0.0.1-internal/GraphicsEnvironment.java:84)
>                at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(java.desktop at 18.0.0.1-internal/GraphicsEnvironment.java:106)
>                at FreeTypeScalerJNICheck.runTest(FreeTypeScalerJNICheck.java:53)
>                at FreeTypeScalerJNICheck.main(FreeTypeScalerJNICheck.java:44)
> 
> We can get rid of the warning by adjusting a JNU_CallStaticMethodByName call in awt_Win32GraphicsEnv.cpp .

Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:

  Add a J2dTraceLn call

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6306/files
  - new: https://git.openjdk.java.net/jdk/pull/6306/files/5d18a76c..ab1101b3

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6306&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6306&range=00-01

  Stats: 5 lines in 1 file changed: 3 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6306.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6306/head:pull/6306

PR: https://git.openjdk.java.net/jdk/pull/6306