Function call resolution failed because function was static.

The IBM XL compiler complained about the SetOutputDistance function
in vtkImplicitModeller.cxx: "Static declarations are not considered
for a function call if the function is not qualified."  I turned the
function into a template so that it would be considered.

Change-Id: I24a11bdaa7a36c90d03e02cc4cc6e639a0bcdc0f
Merge topic 'resolution-failed-static' into master

a3231167 Function call resolution failed because function was static.