Fix minor issue with NMI

Author: callsop

hd6309.c

@@ -7544,7 +7544,8 @@ void HD6309AssertInterupt(InterruptSource src, Interrupt interrupt)
 	assert(src >= IS_NMI && src < IS_MAX);
 	assert(interrupt >= INT_IRQ && interrupt <= INT_NMI);
 
-	if (SyncWaiting)
+	InterruptLine[src] |= Bit(interrupt);
+	if (SyncWaiting || interrupt == INT_NMI)
 		LatchInterrupts();
 	SyncWaiting = 0;
 

mc6809.c

@@ -3230,7 +3230,7 @@ void MC6809AssertInterupt(InterruptSource src, Interrupt interrupt)
 	assert(interrupt >= INT_IRQ && interrupt <= INT_NMI);
 
 	InterruptLine[src] |= Bit(interrupt);
-	if (SyncWaiting)
+	if (SyncWaiting || interrupt == INT_NMI)
 		LatchInterrupts();
 	SyncWaiting = 0;