block: prefer aio_poll to qemu_aio_wait

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/block.c b/block.c
index c9629a4..510430d 100644
--- a/block.c
+++ b/block.c
@@ -471,7 +471,7 @@
         co = qemu_coroutine_create(bdrv_create_co_entry);
         qemu_coroutine_enter(co, &cco);
         while (cco.ret == NOT_DONE) {
-            qemu_aio_wait();
+            aio_poll(qemu_get_aio_context(), true);
         }
     }