[8u] Request for approval of backport from jdk9 : 8040808: Uninitialised memory in OGLBufImgsOps.c, D3DBufImgOps.cpp

[Phil Race]

Bug: https://bugs.openjdk.java.net/browse/JDK-8040808
JDK 8 Fix : http://cr.openjdk.java.net/~prr/8040808.8u/
Identical JDK 9 fix : 
http://hg.openjdk.java.net/jdk9/client/jdk/rev/a9b0cd14e6e1
JDK 8 review thread : 
http://mail.openjdk.java.net/pipermail/2d-dev/2014-July/004692.html

-phil.