src: use C99/POSIX types

"u_int" was a non-standardized extension predating C99 on some platforms.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/extensions/libip6t_hbh.c b/extensions/libip6t_hbh.c
index cddd615..b706f51 100644
--- a/extensions/libip6t_hbh.c
+++ b/extensions/libip6t_hbh.c
@@ -31,7 +31,7 @@
 	XT_GETOPT_TABLEEND,
 };
 
-static u_int32_t
+static uint32_t
 parse_opts_num(const char *idstr, const char *typestr)
 {
 	unsigned long int id;
@@ -56,7 +56,7 @@
 }
 
 static int
-parse_options(const char *optsstr, u_int16_t *opts)
+parse_options(const char *optsstr, uint16_t *opts)
 {
         char *buffer, *cp, *next, *range;
         unsigned int i;
@@ -157,7 +157,7 @@
 }
 
 static void
-print_options(unsigned int optsnr, u_int16_t *optsp)
+print_options(unsigned int optsnr, uint16_t *optsp)
 {
 	unsigned int i;
 
@@ -183,7 +183,7 @@
 		printf(" ");
 	}
 	if (optinfo->flags & IP6T_OPTS_OPTS) printf("opts ");
-	print_options(optinfo->optsnr, (u_int16_t *)optinfo->opts);
+	print_options(optinfo->optsnr, (uint16_t *)optinfo->opts);
 	if (optinfo->flags & IP6T_OPTS_NSTRICT) printf("not-strict ");
 	if (optinfo->invflags & ~IP6T_OPTS_INV_MASK)
 		printf("Unknown invflags: 0x%X ",
@@ -202,7 +202,7 @@
 
 	if (optinfo->flags & IP6T_OPTS_OPTS)
 		printf("--hbh-opts ");
-	print_options(optinfo->optsnr, (u_int16_t *)optinfo->opts);
+	print_options(optinfo->optsnr, (uint16_t *)optinfo->opts);
 	if (optinfo->flags & IP6T_OPTS_NSTRICT)
 		printf("--hbh-not-strict ");
 }