locking: Move error messages onto a single line

Error messages are exempt from the 80 columns rule. Move them
onto one line.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>

src/locking/lock_driver_sanlock.c

@@ -831,8 +831,7 @@ virLockManagerSanlockRegisterKillscript(int sock,
             VIR_FREE(err);
         } else {
             virReportSystemError(-rv, "%s",
-                                 _("Failed to register lock failure"
+                                 _("Failed to register lock failure action"));
-                                   " action"));
         }
         return -1;
     }