fix lint issue

src/fdw/trigger.rs

@@ -17,7 +17,7 @@
 
 use anyhow::{bail, Result};
 use pgrx::*;
-use std::ffi::{c_char, CStr};
+use std::ffi::CStr;
 use supabase_wrappers::prelude::{options_to_hashmap, user_mapping_options};
 
 use super::base::register_duckdb_view;
@@ -97,7 +97,7 @@ unsafe fn auto_create_schema_impl(fcinfo: pg_sys::FunctionCallInfo) -> Result<()
     #[cfg(feature = "pg13")]
     // Fetch the current schema name if the pointer to it is null
     // This pointer is null in pg13 when the user doesn't specify the schema in the CREATE FOREIGN TABLE statement
-    let schema_name = match ((*relation).schemaname as *const c_char).is_null() {
+    let schema_name = match ((*relation).schemaname as *const std::ffi::c_char).is_null() {
         true => Spi::connect(|client| {
             client
                 // Casting as TEXT because the default return type is name (Oid(19)) and the conversion to Rust string fails