filter: remove trailing rule_sep on serialization to string

This is not included in the documentation so it can't be considered
part of API.

Note that the mirrored function usbredirfilter_string_to_rules()
ignores trailing rule_sep and even empty rules.

Signed-off-by: Victor Toso <victortoso@redhat.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/usbredirparser/usbredirfilter.c b/usbredirparser/usbredirfilter.c
index f50d3f5..5076277 100644
--- a/usbredirparser/usbredirfilter.c
+++ b/usbredirparser/usbredirfilter.c
@@ -138,7 +138,10 @@ char *usbredirfilter_rules_to_string(const struct usbredirfilter_rule *rules,
         else
             p += sprintf(p, "-1%c", *token_sep);
 
-        p += sprintf(p, "%d%c", rules[i].allow ? 1:0, *rule_sep);
+        p += sprintf(p, "%d", rules[i].allow ? 1:0);
+        if (i < rules_count - 1) {
+            p += sprintf(p, "%c", *rule_sep);
+        }
     }
 
     return str;