[8u-dev] Backport request: 8078165: [macosx] NPE when attempting to get image from toolkit

[Anton Nashatyrev]

Hello,

     please approve the fix backport from jdk9 to jdk8u-dev. The patch 
was applied without any modifications.

Bug: https://bugs.openjdk.java.net/browse/JDK-8078165
Jdk9 Changeset: http://hg.openjdk.java.net/jdk9/client/jdk/rev/78a67d83381b
Jdk9 Review Thread: 
http://mail.openjdk.java.net/pipermail/awt-dev/2015-April/009290.html

Thanks!
Anton.