readlink null termination problem

["peter garrone" <pgarrone at linuxmail dot org>]

I was having a problem with mkcramfs on cygwin creating symbolic links 
for the compressed linux filesystem.

mkcramfs uses malloc to allocate a buffer that it sends to the readlink function in cygwin path.cc
That function uses memcpy to do a copy of the link into a buffer.
Neither mkcramfs or readlink is null-terminating the string representing the link.

Probably both are at fault. I have fixed my problem by zeroing the buffer in mkcramfs
 before calling readlink, but it would probably be beneficial if readlink terminates
 the returned string, if there is room.



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