[PATCH] qemu-kvm: Fix test for I/O thread

[Jan Kiszka <jan.kiszka@siemens.com>]

Looks to me like this was rather intended. But given that 4e8b8a6d92c5ece048e65be3a3980d24f065b32b claims to actually fix a bug in
its original broken form, please have a careful look.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

diff --git a/qemu/qemu-kvm.c b/qemu/qemu-kvm.c
index 431e26d..c36f60f 100644
--- a/qemu/qemu-kvm.c
+++ b/qemu/qemu-kvm.c
@@ -89,7 +89,7 @@ static void qemu_cond_wait(pthread_cond_t *cond)
     pthread_cond_timedwait(cond, &qemu_mutex, &ts);
     /* If we're the I/O thread, some other thread may be waiting for aio
      * completion */
-    if (!vcpu_info)
+    if (!env)
         qemu_aio_poll();
     cpu_single_env = env;
 }