Kicad: fix crash on exit, when Libedit was called during a session. It fixes...

Kicad: fix crash on exit, when Libedit was called during a session. It fixes also a crash if Libedit was called, closed and reopened.
Happens only if eeschema was called from the Kicad manager.

eeschema/eeschema.cpp

@@ -99,8 +99,7 @@ static struct IFACE : public KIFACE_I
 
         case FRAME_SCH_LIB_EDITOR:
             {
-                LIB_EDIT_FRAME* frame = new LIB_EDIT_FRAME( aKiway,
-                                            dynamic_cast<SCH_EDIT_FRAME*>( aParent ) );
+                LIB_EDIT_FRAME* frame = new LIB_EDIT_FRAME( aKiway, aParent );
                 return frame;
             }
             break;

eeschema/libeditframe.cpp

@@ -187,7 +187,7 @@ END_EVENT_TABLE()
 
 #define LIB_EDIT_FRAME_NAME wxT( "LibeditFrame" )
 
-LIB_EDIT_FRAME::LIB_EDIT_FRAME( KIWAY* aKiway, SCH_EDIT_FRAME* aParent ) :
+LIB_EDIT_FRAME::LIB_EDIT_FRAME( KIWAY* aKiway, wxWindow* aParent ) :
     SCH_BASE_FRAME( aKiway, aParent, FRAME_SCH_LIB_EDITOR, _( "Library Editor" ),
         wxDefaultPosition, wxDefaultSize, KICAD_DEFAULT_DRAWFRAME_STYLE, GetLibEditFrameName() )
 {

eeschema/libeditframe.h

@@ -122,7 +122,7 @@ class LIB_EDIT_FRAME : public SCH_BASE_FRAME
 
 public:
 
-    LIB_EDIT_FRAME( KIWAY* aKiway, SCH_EDIT_FRAME* aParent );
+    LIB_EDIT_FRAME( KIWAY* aKiway, wxWindow* aParent );
 
     ~LIB_EDIT_FRAME();