Remove unnecessary casts of function pointers through usize

Author: sdroege

src/codegen/function_body_chunk.rs

@@ -544,10 +544,7 @@ impl Builder {
                     if is_destroy || trampoline.scope.is_async() {
                         format!("Box_::from_raw({func} as *mut _)")
                     } else if trampoline.scope.is_call() {
-                        format!(
-                            "{} as *const _ as usize as *mut {}",
-                            func, trampoline.bound_name
-                        )
+                        format!("{} as *mut {}", func, trampoline.bound_name)
                     } else {
                         format!("&*({func} as *mut _)")
                     },
@@ -1016,7 +1013,7 @@ impl Builder {
                 Chunk::FfiCallParameter {
                     transformation_type: TransformationType::ToGlibDirect {
                         name: if all_call {
-                            format!("super_callback{pos} as *const _ as usize as *mut _")
+                            format!("super_callback{pos} as *const _ as *mut _")
                         } else {
                             format!("Box_::into_raw(super_callback{pos}) as *mut _")
                         },