whpx: i386: ignore send_msi to interrupt vector 0

Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
Link: https://lore.kernel.org/r/20260223233950.96076-28-mohamed@unpredictable.fr
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

target/i386/whpx/whpx-apic.c

@@ -192,6 +192,11 @@ static void whpx_send_msi(MSIMessage *msg)
     uint8_t trigger_mode = (data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
     uint8_t delivery = (data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x7;
 
+    if (vector == 0) {
+        warn_report("Ignoring request for interrupt vector 0");
+        return;
+    }
+
     WHV_INTERRUPT_CONTROL interrupt = {
         /* Values correspond to delivery modes */
         .Type = delivery,