add commit about error condition

1 files changed, 3 insertions, 0 deletions

diff --git a/cqrlogo.c b/cqrlogo.c
index c566cd7..927b5c3 100644
--- a/cqrlogo.c
+++ b/cqrlogo.c
@@ -128,6 +128,9 @@ struct bitmap_t * encode_qrcode (char *text, unsigned int scale, unsigned int bo
        
        qrcode = QRcode_encodeString8bit(text, 0, level);
 
+       /* this happens if the string is too long
+	* possibly we have an URL (referer) that is too long, so the code
+	* automatically falls back to http_server (see main()) */
        if (qrcode == NULL)
                return NULL;