Kernel: Move Scheduler::yield() lock check after interrupts disabled

I have no idea why this solves a bug where current processor has
scheduler lock at the beginning of yield.

kernel/kernel/Scheduler.cpp

@@ -133,11 +133,11 @@ namespace Kernel
 
 	void Scheduler::yield()
 	{
-		ASSERT(!m_lock.current_processor_has_lock());
-
 		auto state = Processor::get_interrupt_state();
 		Processor::set_interrupt_state(InterruptState::Disabled);
 
+		ASSERT(!m_lock.current_processor_has_lock());
+
 #if ARCH(x86_64)
 		asm volatile(
 			"movq %%rsp, %%rcx;"