As far as I can see the patch is broken, also please use nullptr instead of 0 for pointers.
Ok, fixed. Also, this patch is probably too trivial to apply it using patch 8-)
diff --git a/src/plugins/contrib/MouseSap/MouseSap.cpp b/src/plugins/contrib/MouseSap/MouseSap.cpp
index e611f18..77bde4d 100644
--- a/src/plugins/contrib/MouseSap/MouseSap.cpp
+++ b/src/plugins/contrib/MouseSap/MouseSap.cpp
@@ -64,6 +64,7 @@ MouseSap* MouseSap::pMouseSap;
// ----------------------------------------------------------------------------
MouseSap::MouseSap()
+ : m_pMyLog(nullptr), m_bEditorsAttached(false), m_bMouseSapEnabled(false), m_pMMSapEvents(nullptr)
// ----------------------------------------------------------------------------
{
//ctor