VAT: don't pass u8 to unformat - it expects an 4 byte integer

Change-Id: I82f21a77b96b9d9f00a4d3cf261bb4bd4644460b
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/vpp-api-test/vat/api_format.c b/vpp-api-test/vat/api_format.c
index 00bb976..549bd03 100644
--- a/vpp-api-test/vat/api_format.c
+++ b/vpp-api-test/vat/api_format.c
@@ -5768,7 +5768,7 @@
   u8 is_unreach = 0, is_prohibit = 0;
   u8 create_vrf_if_needed = 0;
   u8 is_add = 1;
-  u8 next_hop_weight = 1;
+  u32 next_hop_weight = 1;
   u8 not_last = 0;
   u8 is_multipath = 0;
   u8 address_set = 0;
@@ -6054,7 +6054,7 @@
   u32 sw_if_index = ~0, table_id = 0;
   u8 create_table_if_needed = 0;
   u8 is_add = 1;
-  u8 next_hop_weight = 1;
+  u32 next_hop_weight = 1;
   u8 is_multipath = 0;
   u32 next_hop_table_id = 0;
   u8 next_hop_set = 0;