[OpenJDK 2D-Dev] review backport fix of 8081756 to 8u-dev

[Phil Race]

Andrew/Sergey,

Could one of you please be a 'sanity check' backport reviewer on
this backport of a missing check for NULL in LittleCMS code.

It is identical to the JDK 9 changeset : - 
http://hg.openjdk.java.net/jdk9/client/jdk/rev/80e814d165f9

BTW I already sent that to upstream ..

diff --git a/src/share/native/sun/java2d/cmm/lcms/cmsopt.c 
b/src/share/native/sun/java2d/cmm/lcms/cmsopt.c
--- a/src/share/native/sun/java2d/cmm/lcms/cmsopt.c
+++ b/src/share/native/sun/java2d/cmm/lcms/cmsopt.c
@@ -260,7 +260,9 @@
                              cmsStage* Multmat = 
cmsStageAllocMatrix(Lut->ContextID, 3, 3, (const cmsFloat64Number*) 
&res, NULL);

                              // Recover the chain
+                            if (Multmat != NULL) {
                              Multmat->Next = chain;
+                            }
                              *pt1 = Multmat;
                       }

-phil.