-#define wattr_set(win,a,p,opts) ((win)->_attrs = (((a) & ~A_COLOR) | COLOR_PAIR(p)), OK)
-#define wattr_get(win,a,p,opts) ((void)((a) != (void *)0 && (*(a) = (win)->_attrs)), \
- (void)((p) != (void *)0 && (*(p) = PAIR_NUMBER((win)->_attrs))), \
+#define wattr_set(win,a,p,opts) (((win) \
+ ? ((win)->_attrs = (((a) & ~A_COLOR) | (attr_t)COLOR_PAIR(p))) \
+ : OK), \
+ OK)
+#define wattr_get(win,a,p,opts) (((win) \
+ ? ((void)((a) != (void *)0 && (*(a) = (win)->_attrs)), \
+ (void)((p) != (void *)0 && (*(p) = (short)PAIR_NUMBER((win)->_attrs))),OK) \
+ : OK), \