wchgat() failed to mask out colors from 'attr'. So you could get a weird mix of colors from that and colors specified via the 'color' parameter. Fixes issue #359.

Author: Bill-Gray

pdcurses/attr.c

@@ -358,7 +358,7 @@ int wchgat(WINDOW *win, int n, attr_t attr, short color, const void *opts)
     if (!win)
         return ERR;
 
-    newattr = (attr & A_ATTRIBUTES) | COLOR_PAIR(integer_color_pair);
+    newattr = (attr & (A_ATTRIBUTES & ~A_COLOR)) | COLOR_PAIR(integer_color_pair);
 
     startpos = win->_curx;
     endpos = ((n < 0) ? win->_maxx : min(startpos + n, win->_maxx)) - 1;