do not duplicate CONFIG_PID_FILE_PATH and ".pid" strings

   text	   data	    bss	    dec	    hex	filename
 981737	    485	   7296	 989518	  f194e	busybox_old
 981704	    485	   7296	 989485	  f192d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/sysklogd/klogd.c b/sysklogd/klogd.c
index 76eccf1..17b6ca2 100644
--- a/sysklogd/klogd.c
+++ b/sysklogd/klogd.c
@@ -231,7 +231,7 @@
 
 	syslog(LOG_NOTICE, "klogd started: %s", bb_banner);
 
-	write_pidfile(CONFIG_PID_FILE_PATH "/klogd.pid");
+	write_pidfile_std_path_and_ext("klogd");
 
 	used = 0;
 	while (!bb_got_signal) {
@@ -295,7 +295,7 @@
 
 	klogd_close();
 	syslog(LOG_NOTICE, "klogd: exiting");
-	remove_pidfile(CONFIG_PID_FILE_PATH "/klogd.pid");
+	remove_pidfile_std_path_and_ext("klogd");
 	if (bb_got_signal)
 		kill_myself_with_sig(bb_got_signal);
 	return EXIT_FAILURE;