qemuProcessReconnectHelper: Don't create joinable thread

In the qemuProcessReconnectHelper() a new thread that does all the
interesting work is spawned. The rationale is to not block the daemon
startup process in case of unresponsive qemu. However, the thread
handler is a local variable which gets lost once the control goes out of
scope. Hence the thread gets leaked. We can avoid this if the thread
isn't made joinable.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_process.c

@@ -3281,7 +3281,7 @@ qemuProcessReconnectHelper(virDomainObjPtr obj,
      */
     virConnectRef(data->conn);
 
-    if (virThreadCreate(&thread, true, qemuProcessReconnect, data) < 0) {
+    if (virThreadCreate(&thread, false, qemuProcessReconnect, data) < 0) {
 
         virConnectClose(data->conn);