Ensured that ThreadPool::moveJobToFront can survive a stale job pointer

modules/juce_core/threads/juce_ThreadPool.cpp

@@ -207,13 +207,10 @@ void ThreadPool::moveJobToFront (const ThreadPoolJob* job) noexcept
 {
     const ScopedLock sl (lock);
 
-    if (! job->isActive)
-    {
-        auto index = jobs.indexOf (const_cast<ThreadPoolJob*> (job));
+    auto index = jobs.indexOf (const_cast<ThreadPoolJob*> (job));
 
-        if (index > 0)
-            jobs.move (index, 0);
-    }
+    if (index > 0 && ! job->isActive)
+        jobs.move (index, 0);
 }
 
 bool ThreadPool::waitForJobToFinish (const ThreadPoolJob* const job, const int timeOutMs) const