From 7431c14ba6f17574dbfae5c779596babaf1cd522 Mon Sep 17 00:00:00 2001
From: Torsten Dreyer <Torsten@t3r.de>
Date: Sun, 9 Oct 2011 21:37:52 +0200
Subject: [PATCH] don't use uninitialized variables

---
 src/Main/FGEventHandler.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Main/FGEventHandler.cxx b/src/Main/FGEventHandler.cxx
index 950ccfd10..875da4b3f 100644
--- a/src/Main/FGEventHandler.cxx
+++ b/src/Main/FGEventHandler.cxx
@@ -215,11 +215,13 @@ bool FGEventHandler::handle(const osgGA::GUIEventAdapter& ea,
                 button = 3;
             else if (ea.getScrollingDeltaY() < 0)
                 button = 4;
+            else
+                button = -1;
         } else if (ea.getScrollingMotion() == osgGA::GUIEventAdapter::SCROLL_UP)
             button = 3;
         else
             button = 4;
-        if (mouseClickHandler) {
+        if (mouseClickHandler && button != -1) {
             (*mouseClickHandler)(button, 0, x, y, mainWindow, &ea);
             (*mouseClickHandler)(button, 1, x, y, mainWindow, &ea);
         }