libiptc: combine common types: _handle

No real API/ABI change incurred, since the definition of the structs'
types is not visible anyhow.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/include/iptables.h b/include/iptables.h
index 6edd369..c42613c 100644
--- a/include/iptables.h
+++ b/include/iptables.h
@@ -8,15 +8,15 @@
 
 /* Your shared library should call one of these. */
 extern int do_command4(int argc, char *argv[], char **table,
-		      struct iptc_handle **handle);
+		      struct xtc_handle **handle);
 extern int delete_chain4(const xt_chainlabel chain, int verbose,
-			struct iptc_handle *handle);
+			struct xtc_handle *handle);
 extern int flush_entries4(const xt_chainlabel chain, int verbose, 
-			struct iptc_handle *handle);
-extern int for_each_chain4(int (*fn)(const xt_chainlabel, int, struct iptc_handle *),
-		int verbose, int builtinstoo, struct iptc_handle *handle);
+			struct xtc_handle *handle);
+extern int for_each_chain4(int (*fn)(const xt_chainlabel, int, struct xtc_handle *),
+		int verbose, int builtinstoo, struct xtc_handle *handle);
 extern void print_rule4(const struct ipt_entry *e,
-		struct iptc_handle *handle, const char *chain, int counters);
+		struct xtc_handle *handle, const char *chain, int counters);
 
 extern struct xtables_globals iptables_globals;