add QERR_BASE_NOT_FOUND

This qerror will be raised when a given streaming base (backing file)
cannot be found.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Acked-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/qerror.c b/qerror.c
index 2c60e10..637eca7 100644
--- a/qerror.c
+++ b/qerror.c
@@ -52,6 +52,10 @@
         .desc      = "Device '%(device)' can't go on a %(bad_bus_type) bus",
     },
     {
+        .error_fmt = QERR_BASE_NOT_FOUND,
+        .desc      = "Base '%(base)' not found",
+    },
+    {
         .error_fmt = QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
         .desc      = "Block format '%(format)' used by device '%(name)' does not support feature '%(feature)'",
     },