From cfb82ddcbadf33c9550cfeb4ce151d7b5a5b4a8f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=C3=A9a=20Saviot?= <lea.saviot@numworks.com>
Date: Tue, 21 Aug 2018 10:39:17 +0200
Subject: [PATCH] [poincare] Remove unneeded tree copy

---
 poincare/src/addition.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/poincare/src/addition.cpp b/poincare/src/addition.cpp
index aeb1bd0b7..4b4189f1d 100644
--- a/poincare/src/addition.cpp
+++ b/poincare/src/addition.cpp
@@ -223,9 +223,8 @@ Expression Addition::shallowReduce(Context& context, Preferences::AngleUnit angl
   int i = 0;
   int initialNumberOfOperands = thisCopy.numberOfChildren();
   while (i < initialNumberOfOperands) {
-    Expression c = thisCopy.childAtIndex(i);
-    if (c.type() == ExpressionNode::Type::Addition) {
-      thisCopy.mergeChildrenAtIndexInPlace(thisCopy.childAtIndex(i), i);
+    if (thisCopy.childAtIndex(i).type() == ExpressionNode::Type::Addition) {
+      thisCopy.mergeChildrenAtIndexInPlace(thisCopy.childAtIndex(i), i); // The tree is passed by reference
       continue;
     }
     i++;