ncurses 6.1 - patch 20190511

ncurses 6.1 - patch 20190511

+ fix a spurious blank line seen with "infocmp -1fx xterm+x11mouse"
+ add checks in repair_subwindows() to keep the current position and
  scroll-margins inside the resized subwindow.
+ add a limit check in newline_forces_scroll() for the case where the
  row is inside scroll-margins, but not at the end (report by Toshio
  Kuratomi, cf: 20170729).
+ corrected a warning message in tic for extended capabilities versus
  number of parameters.