node-api: fix compiler warning in node_api.h

Fix "-Wstrict-prototypes" warning from AppleClang 14.0.3.14030022,
compiling C, targeting arch arm64 (on x86_64 host). I build my C
addon with -Werror and recent changes to node_api.h broke our build.

PR-URL: nodejs/node#49103
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Gabriel Schulhof <gabrielschulhof@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>

Author: sercher

graal-nodejs/src/node_api.h

@@ -30,7 +30,7 @@ struct uv_loop_s;  // Forward declaration.
 
 typedef napi_value(NAPI_CDECL* napi_addon_register_func)(napi_env env,
                                                          napi_value exports);
-typedef int32_t(NAPI_CDECL* node_api_addon_get_api_version_func)();
+typedef int32_t(NAPI_CDECL* node_api_addon_get_api_version_func)(void);
 
 // Used by deprecated registration method napi_module_register.
 typedef struct napi_module {
@@ -66,7 +66,7 @@ typedef struct napi_module {
 
 #define NAPI_MODULE_INIT()                                                     \
   EXTERN_C_START                                                               \
-  NAPI_MODULE_EXPORT int32_t NODE_API_MODULE_GET_API_VERSION() {               \
+  NAPI_MODULE_EXPORT int32_t NODE_API_MODULE_GET_API_VERSION(void) {           \
     return NAPI_VERSION;                                                       \
   }                                                                            \
   NAPI_MODULE_EXPORT napi_value NAPI_MODULE_INITIALIZER(napi_env env,          \