exp/shiny/iconvg: quantize StartPath coordinates.

They should also be affected by Encoder.HighResolutionCoordinates.

Change-Id: I14c3fb56bddd6684dc59f947201774c1f4e58ead
Reviewed-on: https://go-review.googlesource.com/31373
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2 files changed