network: Fix underflow in for loop when generating bitmask

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/network.c b/src/network.c
index 592ec733ff47890d2f1d6fc45d0d398150f201c8..4f297147f82e6d2e2bddcc65cab3507e667891f8 100644 (file)
--- a/src/network.c
+++ b/src/network.c
@@ -59,7 +59,7 @@ static struct in6_addr prefix_to_bitmask(unsigned int prefix) {
        for (unsigned int i = 0; i < 16; i++)
                bitmask.s6_addr[i] = 0;
 
-       for (unsigned int i = prefix, j = 0; i > 0; i -= 8, j++) {
+       for (int i = prefix, j = 0; i > 0; i -= 8, j++) {
                if (i >= 8)
                        bitmask.s6_addr[j] = 0xff;
                else