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/debug.c b/daemon/debug.c
index cb905cb6..5d26c4e4 100644
--- a/daemon/debug.c
+++ b/daemon/debug.c
@@ -215,7 +215,7 @@ debug_sh (const char *subcmd, int argc, char *const *const argv)
   char *out;
 
   if (argc < 1) {
-    reply_with_error ("debug: sh: expecting a command to run");
+    reply_with_error ("sh: expecting a command to run");
     return NULL;
   }