[cairo] invalid size error, nth ping

[Paolo Bonzini]

I talked to ickle on IRC the other day and he suggested some fixes,
which I applied on the branch.  I reordered the patches because he was
not sure he wanted the cairo-spans.c part (so I placed that one last).

http://www.inf.unisi.ch/~bonzini/webdav/cairo.git

Commentary on my cache branch, as usual, would also be nice. :-)

I also have some patches to glitz.git with bugfixes, added documentation
and examples, support for 64-bit Mac OS and Cocoa, etc.; how can I get
them integrated?  These are at
http://www.inf.unisi.ch/~bonzini/webdav/glitz.git in branch master.

Paolo