Merge pull request #20 from yangfasheng/master

jerry_console.c\jerry_util.c MDK 编译警告修复；

rtthread-port/jerry_console.c

@@ -17,7 +17,7 @@ DECLARE_HANDLER(dir)
     return jerry_create_undefined();
 }
 
-int js_console_init()
+int js_console_init(void)
 {
     jerry_value_t console = jerry_create_object();
     jerry_value_t global_obj = jerry_get_global_object();

rtthread-port/jerry_util.c

@@ -234,10 +234,10 @@ int js_read_file(const char* filename, char **script)
     return length;
 }
 
-extern int js_console_init();
-extern int js_module_init();
-extern int js_buffer_init();
-extern int js_buffer_cleanup();
+extern int js_console_init(void);
+extern int js_module_init(void);
+extern int js_buffer_init(void);
+extern int js_buffer_cleanup(void);
 
 static js_util_user _user_init = NULL, _user_cleanup = NULL;