minios, blkfront: set default block path.

remove unnecessary path head stripping.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

extras/mini-os/blkfront.c

@@ -71,8 +71,8 @@ struct blkfront_dev *init_blkfront(char *nodename, uint64_t *sectors, unsigned *
 
     struct blkfront_dev *dev;
 
-    ASSERT(!strncmp(nodename, "/local/domain/", 14));
-    nodename = strchr(nodename + 14, '/') + 1;
+    if (!nodename)
+        nodename = "device/vbd/768";
 
     char path[strlen(nodename) + 1 + 10 + 1];