X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=include%2Fcurses.wide;h=58ccd150bc950a2e06017e2f9cc7f4b115758f4e;hp=5d130a962284307ee3b2a3c524fa5fee7828d299;hb=2e68dc325852af56f2ec6c315b323a4f9c3d62c9;hpb=5eb177874dea59107a1a2ea44f5d8f5bb99550b2

diff --git a/include/curses.wide b/include/curses.wide
index 5d130a96..58ccd150 100644
--- a/include/curses.wide
+++ b/include/curses.wide
@@ -1,4 +1,4 @@
-/* $Id: curses.wide,v 1.46 2014/02/01 22:00:32 tom Exp $ */
+/* $Id: curses.wide,v 1.49 2017/03/26 00:04:04 tom Exp $ */
 /*
  * vile:cmode:
  * This file is part of ncurses, designed to be appended after curses.h.in
@@ -261,7 +261,7 @@ extern NCURSES_EXPORT(int) NCURSES_SP_NAME(vid_puts) (SCREEN*, attr_t, NCURSES_P
 #define wins_wstr(w,t)			wins_nwstr((w),(t),-1)
 
 #if !NCURSES_OPAQUE
-#define wgetbkgrnd(win,wch)		((win) ? (*(wch) = (win)->_bkgrnd) : *(wch), OK)
+#define wgetbkgrnd(win,wch)		((0 != (const void*)(wch)) ? ((win) ? (*(wch) = (win)->_bkgrnd) : *(wch), OK) : ERR)
 #endif
 
 #define mvadd_wch(y,x,c)		mvwadd_wch(stdscr,(y),(x),(c))