message: NFC: Fold variable into initializer.
diff: @@ -7316,15 +7316,13 @@ impl ModuleCodeGenerator<LLVMFunctionCodeGenerator, LLVMBackend, CodegenError>
  Some(Linkage::External),
  );
  - let signatures = Map::new();
  -
  LLVMModuleCodeGenerator {
  context: Some(context),
  builder: Some(builder),
  intrinsics: Some(intrinsics),
  module,
  functions: vec![],
  - signatures,
  + signatures: Map::new(),
  signatures_raw: Map::new(),
  function_signatures: None,
  func_import_count: 0,
  