Drag and drop in wxStyledTextCtrl was broken, apparently since upgrade to Scintilla 2. Restore it by using the correct wxDrag_XXX constants instead of boolean values in the code for wxEVT_STC_START_DRAG events generation. Closes #11709. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65827 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775