patchRename advice.object_name_warning to objectNameWarning

> We spell config variables in camelCase instead of with_underscores.
>
> Signed-off-by: Thomas Rast <trast@inf.ethz.ch>
> ---
>
> I figure since we don't have the variable in any release yet *and* the
> worst possible outcome is that someone sees the advice message again,
> the consistency is worth the change.

>
>  advice.c    | 2 +-
>  sha1_name.c | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/advice.c b/advice.c
> index 2a52098..3eca9f5 100644
> --- a/advice.c
> +++ b/advice.c
> @@ -35,7 +35,7 @@
>  	{ "implicitidentity", &advice_implicit_identity },
>  	{ "detachedhead", &advice_detached_head },
>  	{ "setupstreamfailure", &advice_set_upstream_failure },
> -	{ "object_name_warning", &advice_object_name_warning },
> +	{ "objectnamewarning", &advice_object_name_warning },
>  	{ "rmhints", &advice_rm_hints },
>  
>  	/* make this an alias for backward compatibility */
> diff --git a/sha1_name.c b/sha1_name.c
> index 1d210e3..852dd95 100644
> --- a/sha1_name.c
> +++ b/sha1_name.c
> @@ -445,7 +445,7 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
>  	"\n"
>  	"where \"$br\" is somehow empty and a 40-hex ref is created. Please\n"
>  	"examine these refs and maybe delete them. Turn this message off by\n"
> -	"running \"git config advice.object_name_warning false\"");
> +	"running \"git config advice.objectNameWarning false\"");
>  	unsigned char tmp_sha1[20];
>  	char *real_ref = NULL;
>  	int refs_found = 0;