Added handling of task pending events from scheduler.

Previously all pending events were handled on return of exceptions
in process context. This was causing threads that run in userspace
and take no exceptions not handle their pending events indefinitely.
Now scheduler handles them in irq context as well.

src/generic/irq.c

@@ -74,15 +74,6 @@ void do_irq(void)
 		printk("Spurious or broken irq\n"); BUG();
 	}
 	irq_enable(irq_index);
-#if 0
-	/* Process any pending flags for currently runnable task */
-	if (!in_nested_irq_context()) {
-		if (in_user()) {
-			if (current->flags & TASK_SUSPENDING)
-				sched_suspend_async();
-		}
-	}
-#endif
 }