lib-index: fix off-by-one in index flag update test

When selecting the second seq, the max value we should generate is
hdr.messages_count - not one less than that.

diff --git a/src/lib-index/test-mail-index-transaction-update.c b/src/lib-index/test-mail-index-transaction-update.c
index af9067b719c960be76ade9fc21be2d077e471686..0b90cc198efefb02d2fe1a0c57b8bdf24ddedbf0 100644 (file)
--- a/src/lib-index/test-mail-index-transaction-update.c
+++ b/src/lib-index/test-mail-index-transaction-update.c
@@ -347,7 +347,7 @@ static void test_mail_index_flag_update_random(void)
                change = i_rand() % (MAIL_FLAGS_NONRECENT+1);
                seq1 = (i_rand() % hdr.messages_count) + 1;
                seq2 = seq1 == hdr.messages_count ? seq1 :
-                       (i_rand() % (hdr.messages_count - seq1)) + seq1;
+                       (i_rand() % (hdr.messages_count - seq1 + 1)) + seq1;
 
                switch (i_rand() % 3) {
                case 0: