lib-mail: test-message-header-decode - Use ptrdiff_t for rep_char_len

The length is compared to a pointer difference, so using ptrdiff_t
squashes a warning.

diff --git a/src/lib-mail/test-message-header-decode.c b/src/lib-mail/test-message-header-decode.c
index 3f5d8f5dac89ba3cda11718bc81f995e7cca6e2a..0221d1ab6aff68c76434d6e96871fa3e87124ac0 100644 (file)
--- a/src/lib-mail/test-message-header-decode.c
+++ b/src/lib-mail/test-message-header-decode.c
@@ -82,7 +82,7 @@ check_encode_decode_result(const unsigned char *inbuf, size_t inbuf_len,
 {
        static const unsigned char *rep_char =
                (const unsigned char *)UNICODE_REPLACEMENT_CHAR_UTF8;
-       static const unsigned int rep_char_len =
+       static const ptrdiff_t rep_char_len =
                UNICODE_REPLACEMENT_CHAR_UTF8_LEN;
        const unsigned char *outbuf = str_data(out);
        size_t outbuf_len = str_len(out);