qemuDomainResume: allow to resume domain with guest panicked

In case of guest panicked, preserved crashed domain has stopped CPUs.
It's not possible to use tools like WinDbg for the problem investigation
until we start CPUs back.

src/qemu/qemu_driver.c

@@ -1955,6 +1955,7 @@ static int qemuDomainResume(virDomainPtr dom)
     int ret = -1;
     virObjectEventPtr event = NULL;
     int state;
+    int reason;
     virQEMUDriverConfigPtr cfg = NULL;
 
     if (!(vm = qemuDomObjFromDomain(dom)))
@@ -1974,12 +1975,14 @@ static int qemuDomainResume(virDomainPtr dom)
         goto endjob;
     }
 
-    state = virDomainObjGetState(vm, NULL);
+    state = virDomainObjGetState(vm, &reason);
     if (state == VIR_DOMAIN_PMSUSPENDED) {
         virReportError(VIR_ERR_OPERATION_INVALID,
                        "%s", _("domain is pmsuspended"));
         goto endjob;
-    } else if (state == VIR_DOMAIN_PAUSED) {
+    } else if ((state == VIR_DOMAIN_CRASHED &&
+                reason == VIR_DOMAIN_CRASHED_PANICKED) ||
+               state == VIR_DOMAIN_PAUSED) {
         if (qemuProcessStartCPUs(driver, vm, dom->conn,
                                  VIR_DOMAIN_RUNNING_UNPAUSED,
                                  QEMU_ASYNC_JOB_NONE) < 0) {