daemon: Don't need to prefix error messages with the command name.

The RPC stubs already prefix the command name to error messages.
The daemon doesn't have to do this.  As a (small) benefit this also
makes the daemon slightly smaller.

Code in the daemon such as:

  if (argv[0] == NULL) {
    reply_with_error ("passed an empty list");
    return NULL;
  }

now results in error messages like this:

  ><fs> command ""
  libguestfs: error: command: passed an empty list

(whereas previously you would have seen ..command: command:..)

1 files changed, 2 insertions, 2 deletions

diff --git a/daemon/tar.c b/daemon/tar.c
index c3bdcf7e..ebcaded8 100644
--- a/daemon/tar.c
+++ b/daemon/tar.c
@@ -44,7 +44,7 @@ do_tar_in (const char *dir)
 
   if (!root_mounted || dir[0] != '/') {
     cancel_receive ();
-    reply_with_error ("tar-in: root must be mounted and path must be absolute");
+    reply_with_error ("root must be mounted and path must be absolute");
     return -1;
   }
 
@@ -165,7 +165,7 @@ do_tgz_in (const char *dir)
 
   if (!root_mounted || dir[0] != '/') {
     cancel_receive ();
-    reply_with_error ("tar-in: root must be mounted and path must be absolute");
+    reply_with_error ("root must be mounted and path must be absolute");
     return -1;
   }