qemu: Jump to correct label in qemuDomainPinIOThread

If virDomainObjGetDefs used in qemuDomainPinIOThread would fail the code
would jump to the 'cleanup' label after acquiring the job, thus the VM
would be locked forever.

Introduced in commit cac6d639.

src/qemu/qemu_driver.c

@@ -5790,7 +5790,7 @@ qemuDomainPinIOThread(virDomainPtr dom,
         goto cleanup;
 
     if (virDomainObjGetDefs(vm, flags, &def, &persistentDef) < 0)
-        goto cleanup;
+        goto endjob;
 
     if (!(pcpumap = virBitmapNewData(cpumap, maplen)))
         goto endjob;