[ccan] [patch] str: update example to match code

[Brad Hards]

On Monday, January 17, 2011 04:54:24 pm you wrote:
> rusty at vivaldi:~/devel/cvs/ccan/ccan/str$ ../../tools/ccanlint/ccanlint
> Example: sections demonstrate appropriate function (examples_relevant):
> FAIL /home/rusty/devel/cvs/ccan/ccan/str/str.h:64:Example for strcount
> doesn't mention it Total score: 37/38
Nice. Just out of interest, was this the only one?

Brad