DeleteRows 1st arg is not number of rows

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17351 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/newgrid/griddemo.cpp

@@ -250,7 +250,7 @@ GridFrame::GridFrame()
     grid->AppendRows(100);
     grid->AppendCols(100);
     int ir = grid->GetNumberRows();
-    grid->DeleteRows(ir);
+    grid->DeleteRows(0, ir);
     grid->AppendRows(ir);
 
     grid->SetRowSize( 0, 60 );