libiptc: remove typedef indirection

Don't you hate it when iptc_handle_t *x actually is a double-indirection
struct iptc_handle **? This also shows the broken constness model, since
"const iptc_handle_t x" = "iptc_handle_t const x" =
"struct iptc_handle *const x", which is like no const at all.
Lots of things to do then.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/libiptc/libip6tc.c b/libiptc/libip6tc.c
index 71e262e..221a9f3 100644
--- a/libiptc/libip6tc.c
+++ b/libiptc/libip6tc.c
@@ -46,7 +46,7 @@
 #define STRUCT_REPLACE		struct ip6t_replace
 
 #define STRUCT_TC_HANDLE	struct ip6tc_handle
-#define TC_HANDLE_T		ip6tc_handle_t
+#define xtc_handle		ip6tc_handle
 
 #define ENTRY_ITERATE		IP6T_ENTRY_ITERATE
 #define TABLE_MAXNAMELEN	IP6T_TABLE_MAXNAMELEN
@@ -131,7 +131,7 @@
 }
 
 static int
-dump_entry(struct ip6t_entry *e, const ip6tc_handle_t handle)
+dump_entry(struct ip6t_entry *e, struct ip6tc_handle *const handle)
 {
 	size_t i;
 	char buf[40];
@@ -261,7 +261,7 @@
 #ifdef IPTC_DEBUG
 /* Do every conceivable sanity check on the handle */
 static void
-do_check(TC_HANDLE_T h, unsigned int line)
+do_check(struct xtc_handle *h, unsigned int line)
 {
 	unsigned int i, n;
 	unsigned int user_offset; /* Offset of first user chain */