Small crash detector overflow fix

SpigotCore_Main/src/de/steamwar/core/CrashDetector.java

@@ -50,7 +50,7 @@ public class CrashDetector {
     private void run() {
         while (run) {
             long curTime = System.currentTimeMillis();
-            if(curTime > lastTick.get() + TIMEOUT) {
+            if(curTime - TIMEOUT > lastTick.get()) {
                 SWException.log(Bukkit.getServer().getVersion() + " server hung for " + (curTime - lastTick.get()) + "ms, ", Arrays.stream(mainThread.getStackTrace()).map(StackTraceElement::toString).collect(Collectors.joining("\n")));
                 lastTick.set(curTime);
             }