network: make compare functions safe

As the variable 'line' is unsigned.

diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index 429aac5e6c87c2256d657f9f6777841d14a2a778..1f1cdced8f12e76810edf9abf853c4a27db1c5f0 100644 (file)
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -36,7 +36,12 @@ static int network_config_compare_func(const void *a, const void *b) {
         if (r != 0)
                 return r;
 
-        return y->line - x->line;
+        if (x->line < y->line)
+                return -1;
+        if (x->line > y->line)
+                return 1;
+
+        return 0;
 }
 
 const struct hash_ops network_config_hash_ops = {