PlotCommitList: Suppress ReferenceEquality Warnings

Errorprone raises the following warning:
"[ReferenceEquality] Comparison using reference equality
instead of value equality"

A single pointer comparison is fine here.
A comparison with 'equals' would complicate the code and
also impact performance.

Change-Id: I6677dfc483acb95a64afbf433fd2b9460e408264

org.eclipse.jgit/src/org/eclipse/jgit/revplot/PlotCommitList.java

@@ -92,6 +92,7 @@ public void findPassingThrough(final PlotCommit<L> currCommit,
 	}
 
 	/** {@inheritDoc} */
+	@SuppressWarnings("ReferenceEquality")
 	@Override
 	protected void enter(int index, PlotCommit<L> currCommit) {
 		setupChildren(currCommit);
@@ -188,6 +189,7 @@ private void continueActiveLanes(PlotCommit currCommit) {
 	 *            may be null if <code>currCommit</code> is the first commit on
 	 *            the lane
 	 */
+	@SuppressWarnings("ReferenceEquality")
 	private void handleBlockedLanes(final int index, final PlotCommit currCommit,
 			final PlotCommit childOnLane) {
 		for (PlotCommit child : currCommit.children) {
@@ -214,6 +216,7 @@ private void handleBlockedLanes(final int index, final PlotCommit currCommit,
 	}
 
 	// Handles the case where currCommit is a non-first parent of the child
+	@SuppressWarnings("ReferenceEquality")
 	private PlotLane handleMerge(final int index, final PlotCommit currCommit,
 			final PlotCommit childOnLane, PlotCommit child, PlotLane laneToUse) {
 
@@ -287,6 +290,7 @@ private PlotLane handleMerge(final int index, final PlotCommit currCommit,
 	 * @param child
 	 * @param laneToContinue
 	 */
+	@SuppressWarnings("ReferenceEquality")
 	private void drawLaneToChild(final int commitIndex, PlotCommit child,
 			PlotLane laneToContinue) {
 		for (int r = commitIndex - 1; r >= 0; r--) {