Check for client comes too late

[tmeasday]

This line https://github.com/apollostack/react-apollo/blob/master/src/graphql.tsx#L262 is kind of redundant right now because it will have already errored on the line before.

@jbaxleyiii should I just fix this on devel?

While we are on the subject is it odd that we preference props.client to context.client? It's a bit of a gotcha that people can't use a prop to their component called client, and I'm not sure it's documented anywhere.

[jbaxleyiii]

@tmeasday thats a great point on both regards! Let's remove the prop usage and fix the warning!

[jbaxleyiii]

Fixed in next release!