cab reader: cast to int when subtracting unsigned integers

Found by: GitHub CodeQL

diff --git a/libarchive/archive_read_support_format_cab.c b/libarchive/archive_read_support_format_cab.c
index ea256cda895c09a0f8b0b10fcc29a13f6331328c..4d5029b1bd2eed361378a7410a68b241babfa1da 100644 (file)
--- a/libarchive/archive_read_support_format_cab.c
+++ b/libarchive/archive_read_support_format_cab.c
@@ -1134,7 +1134,7 @@ cab_checksum_update(struct archive_read *a, size_t bytes)
        }
        if (sumbytes) {
                int odd = sumbytes & 3;
-               if (sumbytes - odd > 0)
+               if ((int)(sumbytes - odd) > 0)
                        cfdata->sum_calculated = cab_checksum_cfdata_4(
                            p, sumbytes - odd, cfdata->sum_calculated);
                if (odd)