libunit-wasm: Fix rust build

The rust build failed when trying to publish new crates, although for
some reason it didn't fail before that, due to the luw_srb_flags_t enums
generated by bindgen being 32 bit unsigned integers and the flags
argument to luw_set_req_buf() being an unsigned long (which is 64 bits
on my system) and thus producing a type mismatch error.

Rather than fight with rust just make the flags argument an unsigned
int, 32 bits is more than enough for this anyway.

Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/API-C.md b/API-C.md
index d26df8c..1899f05 100644
--- a/API-C.md
+++ b/API-C.md
@@ -436,7 +436,7 @@ luw_init_ctx(&ctx, addr, 4096 /* Response offset */);
 ### luw_set_req_buf
 
 ```C
-int luw_set_req_buf(luw_ctx_t *ctx, u8 **buf, unsigned long flags);
+int luw_set_req_buf(luw_ctx_t *ctx, u8 **buf, unsigned int flags);
 ```
 
 This function is used to take a copy of the request buffer (as discussed