[ostree] switchroot: Properly check for number of arguments

[Colin Walters <walters src gnome org>]

commit 99142ef417f4af82095fba95d02ad73cfd80a2c9
Author: Adrian Perez <aperez igalia com>
Date:   Wed Apr 18 21:13:43 2012 +0300

    switchroot: Properly check for number of arguments
    
    The ostree-switch-root tool expects three arguments (argc=4): new root, OS
    tree target, and init(8) binary to launch inside it. Also, the error message
    when not enough arguments are passed now tells about the second argument
    being the target OS tree.
    
    Reviewed-by: Colin Walters <walters verbum org>

 src/switchroot/ostree-switch-root.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/switchroot/ostree-switch-root.c b/src/switchroot/ostree-switch-root.c
index 60306e6..c96ed3b 100644
--- a/src/switchroot/ostree-switch-root.c
+++ b/src/switchroot/ostree-switch-root.c
@@ -168,9 +168,9 @@ main(int argc, char *argv[])
   int before_init_argc = 0;
   pid_t cleanup_pid;
 
-  if (argc < 3)
+  if (argc < 4)
     {
-      fprintf (stderr, "usage: ostree-switch-root NEWROOT INIT [ARGS...]\n");
+      fprintf (stderr, "usage: ostree-switch-root NEWROOT TARGET INIT [ARGS...]\n");
       exit (1);
     }