[Minor] Fix string copy

src/libmime/content_type.c

@@ -502,8 +502,8 @@ rspamd_content_disposition_parse (const gchar *in,
 {
 	struct rspamd_content_disposition *res = NULL, val;
 
-	val.lc_data = rspamd_mempool_alloc (pool, len);
-	memcpy (val.lc_data, in, len);
+	val.lc_data = rspamd_mempool_alloc (pool, len + 1);
+	rspamd_strlcpy (val.lc_data, in, len);
 	rspamd_str_lc (val.lc_data, len);
 
 	if (rspamd_content_disposition_parser (in, len, &val, pool)) {

src/libutil/str_util.c

@@ -79,10 +79,12 @@ rspamd_str_lc (gchar *str, guint size)
 	switch (leftover) {
 	case 3:
 		*dest++ = lc_map[(guchar)str[i++]];
+		/* falltrough */
 	case 2:
 		*dest++ = lc_map[(guchar)str[i++]];
+		/* falltrough */
 	case 1:
-		*dest++ = lc_map[(guchar)str[i]];
+		*dest = lc_map[(guchar)str[i]];
 	}
 
 }