Overzealous narrowing warning now error

[agcapps]

ascent/src/libs/dray/rendering/renderer.cpp

Line 353 in e504a28

Vec<float32, 2> SS_triad_pos = {{0.1 * 2.0 - 1.0, 0.1 * 2.0 - 1.0}};

Here, my compiler errors out because e.g. 0.1 * 2.0 - 1.0 is a double literal getting stored as a float32. The compiler suggests using static_cast<float32>( ).

Grumpy, because I see no harm, but the compiler treats it as an error.