riched20: EM_GETMODIFY should not report modification after WM_SETTEXT (fixes todo_wine).

dlls/riched20/editor.c

@@ -1929,6 +1929,7 @@ static LRESULT RichEditWndProc_common(HWND hWnd, UINT msg, WPARAM wParam,
     ME_CommitUndo(editor);
     ME_EmptyUndoStack(editor);
     ME_SetSelection(editor, 0, 0);
+    editor->nModifyStep = 0;
     ME_UpdateRepaint(editor);
     return 1;
   }

dlls/riched20/tests/editor.c

@@ -1546,10 +1546,8 @@ static void test_EM_GETMODIFY(void)
   SendMessage(hwndRichEdit, EM_SETMODIFY, FALSE, 0);
   SendMessage(hwndRichEdit, WM_SETTEXT, 0, (LPARAM)TestItem2);
   result = SendMessage(hwndRichEdit, EM_GETMODIFY, 0, 0);
-  todo_wine {
   ok (result == 0,
       "EM_GETMODIFY returned non-zero for WM_SETTEXT\n");
-  }
   
   /* clear the text */
   SendMessage(hwndRichEdit, EM_SETMODIFY, FALSE, 0);