hg: jdk/client: 8191174: PngReader throws IllegalArgumentException because ScanlineStride calculation logic is not proper

[jayathirth.d.v at oracle.com]

Changeset: 6cfee3ad7a76
Author:    jdv
Date:      2018-01-17 10:58 +0530
URL:       http://hg.openjdk.java.net/jdk/client/rev/6cfee3ad7a76

8191174: PngReader throws IllegalArgumentException because ScanlineStride calculation logic is not proper
Reviewed-by: serb, bpb, pnarayanan

! src/java.desktop/share/classes/com/sun/imageio/plugins/png/PNGImageReader.java
+ test/jdk/javax/imageio/plugins/png/PngReaderLargeWidthStrideTest.java