tdf99069: lock the solar mutex before updating sidebar

Change-Id: I55808b72bcebab95ead3e140c9da94596826c27d
Reviewed-on: https://gerrit.libreoffice.org/23811Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

chart2/source/controller/sidebar/ChartAreaPanel.cxx

@@ -18,6 +18,7 @@
 #include <svx/xfltrit.hxx>
 #include <svx/xflftrit.hxx>
 #include <svx/unomid.hxx>
+#include <vcl/svapp.hxx>
 
 #include <svx/tbcontrl.hxx>
 
@@ -391,6 +392,7 @@ void ChartAreaPanel::updateData()
     if (!xInfo.is())
         return;
 
+    SolarMutexGuard aGuard;
     if (xInfo->hasPropertyByName("FillStyle"))
     {
         css::drawing::FillStyle eFillStyle = css::drawing::FillStyle_SOLID;