tree-wide: various fixlets suggested by Coccinelle

src/shared/hostname-setup.c

@@ -284,8 +284,8 @@ int hostname_substitute_wildcards(char *name) {
 
                         struct siphash state;
                         siphash24_init(&state, key.bytes);
-                        siphash24_compress(&mid, sizeof(mid), &state);
-                        siphash24_compress(&counter, sizeof(counter), &state); /* counter mode */
+                        siphash24_compress_typesafe(mid, &state);
+                        siphash24_compress_typesafe(counter, &state); /* counter mode */
                         h = siphash24_finalize(&state);
                         left_bits = sizeof(h) * 8;
                         counter++;