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

[Matthias Baesken]

The new test java/awt/font/JNICheck/FreeTypeScalerJNICheck.java introduced with https://bugs.openjdk.java.net/browse/JDK-8269223 adds -Xcheck:jni , and shows on Windows server 2019 the following JNI warning , so the test fails on this Windows version.

 stdout: [WARNING in native method: JNI call made without checking exceptions when required to from CallStaticVoidMethodV
	at sun.awt.Win32GraphicsEnvironment.initDisplay(java.desktop at 23-internal/Native Method)
	at sun.awt.Win32GraphicsEnvironment.initDisplayWrapper(java.desktop at 23-internal/Win32GraphicsEnvironment.java:95)
	at sun.awt.Win32GraphicsEnvironment.<clinit>(java.desktop at 23-internal/Win32GraphicsEnvironment.java:63)
	at sun.awt.PlatformGraphicsInfo.createGE(java.desktop at 23-internal/PlatformGraphicsInfo.java:34)
	at java.awt.GraphicsEnvironment$LocalGE.createGE(java.desktop at 23-internal/GraphicsEnvironment.java:93)
	at java.awt.GraphicsEnvironment$LocalGE.<clinit>(java.desktop at 23-internal/GraphicsEnvironment.java:84)
	at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(java.desktop at 23-internal/GraphicsEnvironment.java:106)
	at FreeTypeScalerJNICheck.runTest(FreeTypeScalerJNICheck.java:53)
	at FreeTypeScalerJNICheck.main(FreeTypeScalerJNICheck.java:44)


We better add an exception check to get rid of the JNI warning (and also of the test failure) .

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Commit messages:
 - JDK-8276809

Changes: https://git.openjdk.org/jdk/pull/17224/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17224&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8276809
  Stats: 8 lines in 1 file changed: 6 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/17224.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17224/head:pull/17224

PR: https://git.openjdk.org/jdk/pull/17224