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, 1 insertions, 1 deletions

diff --git a/daemon/blockdev.c b/daemon/blockdev.c
index 4d3c2ab0..95e5246c 100644
--- a/daemon/blockdev.c
+++ b/daemon/blockdev.c
@@ -111,7 +111,7 @@ int
 do_blockdev_setbsz (const char *device, int blocksize)
 {
   if (blocksize <= 0 /* || blocksize >= what? */) {
-    reply_with_error ("blockdev_setbsz: blocksize must be > 0");
+    reply_with_error ("blocksize must be > 0");
     return -1;
   }
   return (int) call_blockdev (device, "--setbsz", blocksize, 0);