QError: New QERR_FD_NOT_FOUND

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/qerror.c b/qerror.c
index 128a91e..d75c69a 100644
--- a/qerror.c
+++ b/qerror.c
@@ -65,6 +65,10 @@
         .desc      = "Device %(device) is not removable",
     },
     {
+        .error_fmt = QERR_FD_NOT_FOUND,
+        .desc      = "Failed to find file descriptor named %(name)",
+    },
+    {
         .error_fmt = QERR_INVALID_BLOCK_FORMAT,
         .desc      = "Invalid block format %(name)",
     },