MFC r198490
MFC r198490

 Pull upstream patch to fix ee(1) crash when received SIGWINCH:

   modify _nc_wgetch() to check for a -1 in the fifo, e.g., after a
   SIGWINCH, and discard that value, to avoid confusing application
   (patch by Eygene Ryabinkin, FreeBSD bin/136223).

PR:		136223
Submitted by:	Eygene Ryabinkin
Obtained from:	ncurses-5.7-20091024 snapshot

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