Fix NullPointerException in LogView #2508
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This commit addresses an occasionally occurring NullPointerException in the LogView class: ``` LogListener.logged threw a non-fatal unchecked exception as follows: java.lang.NullPointerException: Cannot invoke "org.eclipse.jface.action.Action.isChecked()" because "this.fActivateViewAction" is null at org.eclipse.ui.internal.views.log.LogView.asyncRefreshAndActivate(LogView.java:1253) at org.eclipse.ui.internal.views.log.LogView.pushEntry(LogView.java:1212) at org.eclipse.ui.internal.views.log.LogView.logged(LogView.java:1143) at org.eclipse.osgi.internal.log.ExtendedLogReaderServiceFactory.safeLogged(ExtendedLogReaderServiceFactory.java:108) at org.eclipse.osgi.internal.log.ExtendedLogReaderServiceFactory$LogTask.run(ExtendedLogReaderServiceFactory.java:56) at org.eclipse.osgi.internal.log.OrderedExecutor$OrderedTaskQueue$OrderedTask.run(ExtendedLogReaderServiceFactory.java:458) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) at java.base/java.lang.Thread.run(Thread.java:1583) ```
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This commit addresses an occasionally occurring NullPointerException in the LogView class: