imap: imap-sync - Avoid unsigned integer overflow

Error: imap-sync.c:433:17: runtime error: unsigned integer overflow:
4294967295 + 1 cannot be represented in type 'unsigned int'

diff --git a/src/imap/imap-sync.c b/src/imap/imap-sync.c
index c777b941f9e28addb3f9b22a529fe5f273e4b684..ecbc83c35ab21353f92dfee2c43864fb91810634 100644 (file)
--- a/src/imap/imap-sync.c
+++ b/src/imap/imap-sync.c
@@ -427,10 +427,10 @@ static void imap_sync_vanished(struct imap_sync_context *ctx)
        line = t_str_new(256);
        str_append(line, "* VANISHED ");
        for (i = 0; i < count; i++) {
-               start_uid = 0; prev_uid = (uint32_t)-1;
+               start_uid = 0; prev_uid = 0;
                for (seq = seqs[i].seq1; seq <= seqs[i].seq2; seq++) {
                        mail_set_seq(ctx->mail, seq);
-                       if (prev_uid + 1 != ctx->mail->uid) {
+                       if (prev_uid != ctx->mail->uid - 1) {
                                if (start_uid != 0) {
                                        if (!comma)
                                                comma = TRUE;