Fix value returned by smack_label_length()

In some cases smack_label_length have returned 0 on incorrect label.
Now smack_label_length() always returns -1 in case of incorrect label.
(cherry picked from commit f7e4232a319b269f6214af660173eebaa605ad9e)

diff --git a/libsmack/libsmack.c b/libsmack/libsmack.c
index e1b8668..fb4fab3 100644 (file)
--- a/libsmack/libsmack.c
+++ b/libsmack/libsmack.c
@@ -728,7 +728,7 @@ static int smack_label_length(const char *label)
        int i;
 
        if (!label || label[0] == '\0' || label[0] == '-')
-               return 0;
+               return -1;
 
        for (i = 0; i < (SMACK_LABEL_LEN + 1) && label[i]; i++) {
                switch (label[i]) {