qapi: Fix document for BlockStats.node-name

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1418694024-26498-1-git-send-email-famz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 6e8db15..2d8bd25 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -423,7 +423,7 @@
 # @device: #optional If the stats are for a virtual block device, the name
 #          corresponding to the virtual block device.
 #
-# @device: #optional The node name of the device. (Since 2.3)
+# @node-name: #optional The node name of the device. (Since 2.3)
 #
 # @stats:  A @BlockDeviceStats for the device.
 #