Fix typos

Change-Id: If7365b05c8f4fd1bf130678cb28f05c9a1add4c7
Reviewed-on: https://gerrit.libreoffice.org/57598Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>
Tested-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>

chart2/source/inc/LifeTime.hxx

@@ -140,7 +140,7 @@ if it should do so.
     //mutex is acquired, call is registered
     {
         //you might access some private members here
-        //but than you need to protect access to these members always like this
+        //but then you need to protect access to these members always like this
         //never call to the outside here
     }
 

comphelper/source/misc/accessiblekeybindinghelper.cxx

@@ -27,7 +27,7 @@ namespace comphelper
 {
 
 
-    using namespace ::com::sun::star; // MT 04/2003: was ::drafts::com::sun::star - otherwise to many changes
+    using namespace ::com::sun::star; // MT 04/2003: was ::drafts::com::sun::star - otherwise too many changes
     using namespace ::com::sun::star::uno;
     using namespace ::com::sun::star::lang;
     using namespace ::com::sun::star::accessibility;

cppuhelper/source/propshlp.cxx

@@ -601,7 +601,7 @@ void OPropertySetHelper::fire
     sal_Int32 * pnHandles,
     const Any * pNewValues,
     const Any * pOldValues,
-    sal_Int32 nHandles, // These is the Count of the array
+    sal_Int32 nHandles, // This is the Count of the array
     sal_Bool bVetoable
 )
 {