A couple of fixes to the python examples

Hello,

I'm reading the guide and really enjoying it. Now at chapter 5 and I'm trying to play a bit with the clone series examples in python and I believe I've found a couple of bugs.

Note that it looks like the bug fixed by the last commit [1] seems to be present in the C version too (in clone.c kvmap stores kvmsgs in one place and char * in another).

Best regards,

-sbi

[1] https://github.com/lesbi/zguide/commit/bf371663b33276226588f3c9e2d2645e5088fe38