[SYSTEMML-2068] Fix sparse-dense vector xor operations

This patch fixes the vector primitive for sparse-dense xor operations
which used a wrong signature leading to codegen compilation errors. 

Project: http://git-wip-us.apache.org/repos/asf/systemml/repo
Commit: http://git-wip-us.apache.org/repos/asf/systemml/commit/ae98864e
Tree: http://git-wip-us.apache.org/repos/asf/systemml/tree/ae98864e
Diff: http://git-wip-us.apache.org/repos/asf/systemml/diff/ae98864e

Branch: refs/heads/master
Commit: ae98864e5061da0a44aebd703104177bd8a4d9d0
Parents: d79e1c5
Author: Matthias Boehm <mboe...@gmail.com>
Authored: Sun Feb 4 23:56:12 2018 -0800
Committer: Matthias Boehm <mboe...@gmail.com>
Committed: Sun Feb 4 23:56:12 2018 -0800

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 .../org/apache/sysml/runtime/codegen/LibSpoofPrimitives.java     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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http://git-wip-us.apache.org/repos/asf/systemml/blob/ae98864e/src/main/java/org/apache/sysml/runtime/codegen/LibSpoofPrimitives.java
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diff --git 
a/src/main/java/org/apache/sysml/runtime/codegen/LibSpoofPrimitives.java 
b/src/main/java/org/apache/sysml/runtime/codegen/LibSpoofPrimitives.java
index 33b18b9..8418377 100644
--- a/src/main/java/org/apache/sysml/runtime/codegen/LibSpoofPrimitives.java
+++ b/src/main/java/org/apache/sysml/runtime/codegen/LibSpoofPrimitives.java
@@ -646,8 +646,8 @@ public class LibSpoofPrimitives
        }
 
        //6. sparse vector vs. dense vector
-       public static void vectXorWrite(double[] a, double[] b, int ai, int[] 
aix, int bi, int alen, int len) {
-               vectXorWrite(a, b, aix, ai, bi, alen, len);
+       public static double[] vectXorWrite(double[] a, double[] b, int ai, 
int[] aix, int bi, int alen, int len) {
+               return vectXorWrite(a, b, aix, ai, bi, alen, len);
        }
 
        //custom vector pow

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