8144938: Handle properly coordinate overflow in Marlin Renderer
Summary: skip point coordinates with NaN/Infinity values
Reviewed-by: flar, prr

8149338: JVM Crash caused by Marlin renderer not handling NaN coordinates
Summary: use first / last Y crossings to compute edge min/max Y and ensure consistency with edgeBuckets / edgeBucketCounts arrays
Reviewed-by: flar, prr