Reformatting variable declarations

In general, we prefer `type *var` over `type * var`.

This is the output of the following command:

    find . -type f -exec sed -i '' -E 's/([a-z]) \* ([a-z])/\1 \*\2/g' {} \;

Depends on pull request #765.

@bmunkholm @alazier @tgoyne