添加offset和len的边界检测，可能参数相加会越界
Merge branch 'master' of https://github.com/yumm007/C

Conflicts:
	C/minifs/mini_fs.c
Merge branch 'master' of https://github.com/yumm007/C
mini_fs 去掉 check argc宏，ferase函数当文件长度为0时不进行擦除操作