pc: free i8259

Simiarly to 2ba154cfSigned-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NMarcel Apfelbaum <marcel@redhat.com>

hw/i386/pc_q35.c

@@ -213,6 +213,8 @@ static void pc_q35_init(MachineState *machine)
     for (i = 0; i < ISA_NUM_IRQS; i++) {
         gsi_state->i8259_irq[i] = i8259[i];
     }
+    g_free(i8259);
+
     if (pcmc->pci_enabled) {
         ioapic_init_gsi(gsi_state, "q35");
     }