add a empty_irq handler for example.

src/main.c

@@ -7,6 +7,9 @@ void putc(char aChar);				/* print a single char on screen */
 void puts(char *aString);			/* print a string on the screen */
 void puthex(int aNumber);			/* print an Hex number on screen */
 
+void empty_irq(int_regs_t *r) {
+}
+
 /* multiboot entry-point with datastructure as arg. */
 void main(unsigned int * mboot_info)
 {
@@ -23,6 +26,9 @@ void main(unsigned int * mboot_info)
 	
     puts("\n\n");
  
+    idt_setup_handler(0, empty_irq); 
+    idt_setup_handler(0, empty_irq); 
+ 	 
     __asm volatile("sti");
 
     /* minimal setup done ! */