qemu: Filter non SCSI hostdevs in qemuHostdevPrepareSCSIDevices

When commit 1d94b3e7 added code to walk the [n]hostdevs list looking
to add shared hostdevs, it should've filtered any hostdevs that were
not SCSI hostdev's.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_hostdev.c

@@ -275,6 +275,9 @@ qemuHostdevPrepareSCSIDevices(virQEMUDriverPtr driver,
     for (i = 0; i < nhostdevs; i++) {
         virDomainDeviceDef dev;
 
+        if (!virHostdevIsSCSIDevice(hostdevs[i]))
+            continue;
+
         dev.type = VIR_DOMAIN_DEVICE_HOSTDEV;
         dev.data.hostdev = hostdevs[i];