ncurses 6.1 - patch 20191015

ncurses 6.1 - patch 20191015

+ improve buffer-checks in captoinfo.c, for some cases when the
  input string is shorter than expected.
> fix two errata in tic (report/testcases by Hongxu Chen):
+ check for missing character after backslash in write_it
+ check for missing characters after "%>" when converting from termcap
  syntax (cf: 980530).