GUACAMOLE-982: Merge fix the error log message when the creating thread of RDP client fails

diff --git a/src/protocols/rdp/user.c b/src/protocols/rdp/user.c
index c2b487f..62df34f 100644
--- a/src/protocols/rdp/user.c
+++ b/src/protocols/rdp/user.c
@@ -71,7 +71,7 @@
         if (pthread_create(&rdp_client->client_thread, NULL,
                     guac_rdp_client_thread, user->client)) {
             guac_user_log(user, GUAC_LOG_ERROR,
-                    "Unable to start VNC client thread.");
+                    "Unable to start RDP client thread.");
             return 1;
         }