qemu: dump: Resume CPUs only when the VM is still alive

Check if the VM is alive after we possibly called into monitor to reset
the guest.

src/qemu/qemu_driver.c

@@ -3681,7 +3681,8 @@ qemuDomainCoreDumpWithFormat(virDomainPtr dom,
             qemuDomainObjExitMonitor(driver, vm);
         }
 
-        if (resume && qemuProcessStartCPUs(driver, vm, dom->conn,
+        if (resume && virDomainObjIsActive(vm)) {
+            if (qemuProcessStartCPUs(driver, vm, dom->conn,
                                      VIR_DOMAIN_RUNNING_UNPAUSED,
                                      QEMU_ASYNC_JOB_DUMP) < 0) {
                 event = virDomainEventLifecycleNewFromObj(vm,
@@ -3692,6 +3693,7 @@ qemuDomainCoreDumpWithFormat(virDomainPtr dom,
                                    "%s", _("resuming after dump failed"));
             }
         }
+    }
 
     if (qemuDomainObjEndAsyncJob(driver, vm) == 0) {
         vm = NULL;