functions: Add -- to stat_append printf

printf causes scripts to fail when argument starts with a dash

Calling stat_append "- hello" causes the following error:

/etc/rc.d/functions: line 99: printf: - : invalid option
printf: usage: printf [-v var] format [arguments]
[FAIL]

Ref: FS#15713

Signed-off-by: Aaron Griffin <aaronmgriffin@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/functions b/functions
index ba37f57..1d51345 100644
--- a/functions
+++ b/functions
@@ -96,7 +96,7 @@ stat_busy() {
 
 stat_append() {
 	printf "${RESTORE_POSITION}"
-	printf "${C_MAIN}${1}${C_CLEAR}"
+	printf -- "${C_MAIN}${1}${C_CLEAR}"
 	printf "${SAVE_POSITION}"
 }