ncurses 5.6 - patch 20070602

ncurses 5.6 - patch 20070602

+ adapt mouse-handling code from menu library in form-library
  (discussion with Clive Nicolson).
+ add a modification of test/dots.c, i.e., test/dots_mvcur.c to
  illustrate how to use mvcur().
+ modify wide-character flavor of SetAttr() to preserve the
  WidecExt() value stored in the .attr field, e.g., in case it
  is overwritten by chgat (report by Aleksi Torhamo).
+ correct buffer-size for _nc_viswbuf2n() (report by Aleksi Torhamo).
+ build-fixes for Solaris 2.6 and 2.7 (patch by Peter O'Gorman).