Change initialization to avoid numerical instability.
Change initialization to avoid numerical instability.

Brad pointed out that I could avoid the numerical instability by using
fixed values.  These aren't fixed, but they're multiples of fixed
values, which seems to do the trick.



git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@19933 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

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