message: fix(runtime-core) Drop `vm::FuncCtx` if not null.
diff: @@ -563,10 +563,12 @@ impl Drop for ImportBacking {
  fn drop(&mut self) {
  // Properly drop the `vm::FuncCtx` in `vm::ImportedFunc`.
  for (_imported_func_index, imported_func) in (*self.vm_functions).iter_mut() {
  + if !imported_func.func_ctx.as_ptr().is_null() {
  let _: Box<vm::FuncCtx> = unsafe { Box::from_raw(imported_func.func_ctx.as_ptr()) };
  }
  }
  }
  +}
  fn import_functions(
  module: &ModuleInner,
  