Fixed off-by-one errors in lib_m68k/interrupts.c

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>

lib_m68k/interrupts.c

@@ -61,7 +61,7 @@ static __inline__ void set_sr (unsigned short sr)
  */
 void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
 {
-	if ((vec < 0) || (vec > NR_IRQS)) {
+	if ((vec < 0) || (vec >= NR_IRQS)) {
 		printf ("irq_install_handler: wrong interrupt vector %d\n",
 			vec);
 		return;
@@ -73,7 +73,7 @@ void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
 
 void irq_free_handler (int vec)
 {
-	if ((vec < 0) || (vec > NR_IRQS)) {
+	if ((vec < 0) || (vec >= NR_IRQS)) {
 		return;
 	}