[LyX/master] Fix missing initialization

[Jean-Marc Lasgouttes]

commit 2d86b2debbb7f3ca0fde9ed4d835e5fe34f6f949
Author: Jean-Marc Lasgouttes <lasgout...@lyx.org>
Date:   Wed Mar 8 16:41:42 2017 +0100

    Fix missing initialization
    
    This was already fixed after coverity report at bad511f3fe04aff4ff,
    but this part was missing.
---
 src/frontends/qt4/GuiErrorList.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/frontends/qt4/GuiErrorList.cpp 
b/src/frontends/qt4/GuiErrorList.cpp
index 0907c61..7308602 100644
--- a/src/frontends/qt4/GuiErrorList.cpp
+++ b/src/frontends/qt4/GuiErrorList.cpp
@@ -58,7 +58,7 @@ namespace lyx {
 namespace frontend {
 
 GuiErrorList::GuiErrorList(GuiView & lv)
-       : GuiDialog(lv, "errorlist", qt_("Error List")), from_master_(false)
+       : GuiDialog(lv, "errorlist", qt_("Error List")), buf_(0), 
from_master_(false)
 {
        setupUi(this);