ng_source(4): correction after the change r340617

tv_usec has "long" type for all architecture in FreeBSD
and follows __LP64__. However, this is not true for tv_sec
that has "time_t" type.

Since r320347 that changed time_t from 32 to 64 bit integer
for 32 bit version of powerpc architecture, we have only single
i386 architecture having 32 bit time_t type.

Submitted by:	jhb
MFC after:	1 week.

sys/netgraph/ng_source.c

@@ -125,11 +125,14 @@ static int		ng_source_dup_mod(sc_p, struct mbuf *,
 
 /* Parse type for timeval */
 static const struct ng_parse_struct_field ng_source_timeval_type_fields[] = {
-#ifdef __LP64__
+#ifdef __i386__
+	{ "tv_sec",		&ng_parse_int32_type	},
+#else
 	{ "tv_sec",		&ng_parse_int64_type	},
+#endif
+#ifdef __LP64__
 	{ "tv_usec",		&ng_parse_int64_type	},
 #else
-	{ "tv_sec",		&ng_parse_int32_type	},
 	{ "tv_usec",		&ng_parse_int32_type	},
 #endif
 	{ NULL }