ToolItemUpdater: fix possible Integer overflow

Both DELAY and 1_000_000 are Integers. Multiplied they could exceed max
integer. Currently the DELAY is small enough to not overflow, but
changing the constant would silently overflow.

bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/ui/workbench/renderers/swt/ToolItemUpdater.java

@@ -55,7 +55,7 @@ public void updateContributionItems(Selector selector) {
 					if (timestampOfEarliestQueuedUpdate == 0) {
 						timestampOfEarliestQueuedUpdate = System.nanoTime();
 					}
-					if (System.nanoTime() - timestampOfEarliestQueuedUpdate > DELAY * 1_000_000) {
+					if (System.nanoTime() - timestampOfEarliestQueuedUpdate > DELAY * 1_000_000L) {
 						// runnable was not called within the last DELAY milliseconds, do it now.
 						// For scenario: a plugin is forcing that updateContributionItems is called
 						// again and again in less than given DELAY frequency. TimerExec would then