hg: jdk/client: 6574555: PNGImageWriter incorrectly sets bKGD chunk

[jayathirth.d.v at oracle.com]

Changeset: 39dc39093c5e
Author:    jdv
Date:      2018-04-18 13:22 +0530
URL:       http://hg.openjdk.java.net/jdk/client/rev/39dc39093c5e

6574555: PNGImageWriter incorrectly sets bKGD chunk
Reviewed-by: prr, pnarayanan

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