fix GetSize() for large files (patch 1680876) [backport from HEAD]

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@44813 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -95,10 +95,17 @@ wxMac
 
 - Corrected top border size for wxStaticBox with empty label (nusi)
 
+wxMSW:
+
+- Fixed wxFileName::GetSize() for large files
+
+
 2.8.2
 -----
 
 All:
+<<<<<<< changes.txt
+=======
 
 - Added wxSizerFlags::Shaped(), FixedMinSize(), Top() and Bottom() methods.
 - Added wxCSConv::IsOk() (Manuel Martin).
@@ -118,9 +125,21 @@ All:
 - Fix handling of wxSOCKET_REUSEADDR in wxDatagramSocket (troelsk)
 
 Unix Ports:
+>>>>>>> 1.1006.2.13
 
+<<<<<<< changes.txt
+- Added wxSizerFlags::Shaped(), FixedMinSize(), Top() and Bottom() methods
+- Added wxCSConv::IsOk() (Manuel Martin)
+- Added wxDateTime::GetDateOnly()
+- Made wxTextFile work with unseekable files again (David Hart)
+- Added wxCONFIG_USE_SUBDIR flag to wxFileConfig (Giuseppe Bilotta)
+- Added wxSearchCtrl::[Get|Set]DescriptiveText
+- Added wxToolBar::SetTool[Normal|Disabled]Bitmap for wxMSW, wxGTK and wxMac
+
+=======
 - Fixed crash in wxGetUserName() in Unicode build
 
+>>>>>>> 1.1006.2.13
 wxMSW
 
 - Fix lack of spin control update event when control lost focus.

src/common/filename.cpp

@@ -2328,14 +2328,11 @@ wxULongLong wxFileName::GetSize(const wxString &filename)
 
     DWORD lpFileSizeHigh;
     DWORD ret = GetFileSize(f, &lpFileSizeHigh);
-    if (ret == INVALID_FILE_SIZE)
+    if ( ret == INVALID_FILE_SIZE && ::GetLastError() != NO_ERROR )
         return wxInvalidSize;
 
-    // compose the low-order and high-order byte sizes
-    return wxULongLong(ret | (lpFileSizeHigh << sizeof(WORD)*2));
-
-#else           // ! __WIN32__
-
+    return wxULongLong(lpFileSizeHigh, ret);
+#else // ! __WIN32__
     wxStructStat st;
 #ifndef wxNEED_WX_UNISTD_H
     if (wxStat( filename.fn_str() , &st) != 0)