storage: fix typo in previous patch

You'd think I'd learn to actually COMMIT my working tree
between testing that a last-minute fix compiles and pushing.

* src/storage/storage_backend_gluster.c
(virStorageBackendGlusterRefreshVol): Typo fix.
Signed-off-by: NEric Blake <eblake@redhat.com>

src/storage/storage_backend_gluster.c

@@ -259,7 +259,7 @@ virStorageBackendGlusterRefreshVol(virStorageBackendGlusterStatePtr state,
     if ((vol->target.format = virStorageFileProbeFormatFromBuf(name,
                                                                header,
                                                                len)) < 0)
-        goto clenaup;
+        goto cleanup;
     if (!(meta = virStorageFileGetMetadataFromBuf(name, header, len,
                                                   vol->target.format)))
         goto cleanup;