Fix operator precedence error that was causing DK script issues.

Fix operator precedence error that was causing DK script issues.

Ovale was incorrectly parsing:

    a + b * {c / d}
as:
    {a + b} * {c + d}

This change makes it correctly parse as:

    a + {b * {c / d}}

This error was been in Ovale since MoP was released but it takes a rather
complex script to trigger it.

git-svn-id: svn://svn.curseforge.net/wow/ovale/mainline/trunk@869 d5049fe3-3747-40f7-a4b5-f36d6801af5f