Eeschema: fix Bug #1463158 (When a schematic hierarchy is being edited, Eeschema saves sub-sheets in the new project, when the user open a new project, and save the current editon).

This was due to the fact the project name was changed before the user was prompted to save the design.
A very minor other fix.

eeschema/sch_marker.cpp

@@ -69,11 +69,6 @@ SCH_MARKER::SCH_MARKER( const wxPoint& pos, const wxString& text ) :
 }
 
 
-SCH_MARKER::~SCH_MARKER()
-{
-}
-
-
 EDA_ITEM* SCH_MARKER::Clone() const
 {
     return new SCH_MARKER( *this );