From 2e6fbd0679df9d4bb0a7e69c98f3c3cf92b664d6 Mon Sep 17 00:00:00 2001
From: leozide <leozide@gmail.com>
Date: Mon, 13 Nov 2017 11:16:29 -0800
Subject: [PATCH] Fixed crash using the old move tool.

---
 common/view.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/common/view.cpp b/common/view.cpp
index 843631a8..b30ac88b 100644
--- a/common/view.cpp
+++ b/common/view.cpp
@@ -2315,6 +2315,7 @@ void View::StartTracking(lcTrackButton TrackButton)
 	mTrackUpdated = false;
 	mMouseDownX = mInputState.x;
 	mMouseDownY = mInputState.y;
+	mMouseDownPiece = nullptr;
 	lcTool Tool = GetCurrentTool();
 
 	switch (Tool)
@@ -2788,7 +2789,7 @@ void View::OnMouseMove()
 					}
 				}
 			}
-			else if (mTrackTool == LC_TRACKTOOL_MOVE_XYZ)
+			else if (mTrackTool == LC_TRACKTOOL_MOVE_XYZ && mMouseDownPiece)
 			{
 				lcMatrix44 NewPosition = GetPieceInsertPosition(true, mMouseDownPiece);
 				lcVector3 Distance = NewPosition.GetTranslation() - mMouseDownPosition;