mingw64: Don't cast from MAKELONG to pointer directly

Change-Id: Ia0ff071a5676f27d39175e30d7c5f472e32c99b3

fpicker/source/win32/filepicker/PreviewCtrl.cxx

@@ -280,7 +280,7 @@ CFilePreview::~CFilePreview( )
 {
     // unregister preview window class
     sal_Bool bRet = UnregisterClass(
-        (LPCTSTR)MAKELONG( m_atomPrevWndClass, 0 ),
+        (LPCTSTR)(DWORD_PTR)MAKELONG( m_atomPrevWndClass, 0 ),
         m_hInstance );
     OSL_POSTCOND( bRet, "Unregister preview window class failed" );
 }

fpicker/source/win32/filepicker/dibpreview.cxx

@@ -48,12 +48,6 @@ namespace /* private */
 
 #define PREVIEWWND_CLASS_NAME TEXT("DIBPreviewWnd###")
 
-// means 3 pixel left and 3 pixel right
-#define HORZ_BODER_SPACE    6
-
-// means 3 pixel top and 3 pixel bottom
-#define VERT_BORDER_SPACE   6
-
 //---------------------------------------------------
 // static member initialization
 //---------------------------------------------------
@@ -445,7 +439,7 @@ void SAL_CALL CDIBPreview::UnregisterDibPreviewWindowClass()
 
     if (0 == s_RegisterDibPreviewWndCount)
     {
-        UnregisterClass((LPCTSTR)MAKELONG(s_ClassAtom,0),m_Instance);
+        UnregisterClass((LPCTSTR)(DWORD_PTR)MAKELONG(s_ClassAtom,0),m_Instance);
         s_ClassAtom = 0;
     }
 }

fpicker/source/win32/filepicker/helppopupwindow.cxx

@@ -585,7 +585,7 @@ void SAL_CALL CHelpPopupWindow::UnregisterWindowClass( )
     if ( 0 == s_RegisterWndClassCount )
     {
         if ( !UnregisterClass(
-                 (LPCTSTR)MAKELONG( s_ClassAtom, 0 ), m_hInstance ) )
+                 (LPCTSTR)(DWORD_PTR)MAKELONG( s_ClassAtom, 0 ), m_hInstance ) )
         {
             OSL_FAIL( "unregister window class failed" );
         }

fpicker/source/win32/folderpicker/MtaFop.cxx

@@ -815,7 +815,7 @@ void SAL_CALL CMtaFolderPicker::UnregisterStaRequestWindowClass( )
     if ( 0 == s_StaRequestWndRegisterCount )
     {
         UnregisterClass(
-            (LPCTSTR)MAKELONG( s_ClassAtom, 0 ), m_hInstance );
+            (LPCTSTR)(DWORD_PTR)MAKELONG( s_ClassAtom, 0 ), m_hInstance );
 
         s_ClassAtom = 0;
     }