patch 8.0.0069
Problem: Compiler warning for self-comparison.
Solution: Define ONE_WINDOW and add #ifdef.
diff --git a/src/globals.h b/src/globals.h
index ffcadb7..fea9543 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -546,6 +546,7 @@
EXTERN win_T *firstwin; /* first window */
EXTERN win_T *lastwin; /* last window */
EXTERN win_T *prevwin INIT(= NULL); /* previous window */
+# define ONE_WINDOW (firstwin == lastwin)
# define W_NEXT(wp) ((wp)->w_next)
# define FOR_ALL_WINDOWS(wp) for (wp = firstwin; wp != NULL; wp = wp->w_next)
# define FOR_ALL_TABPAGES(tp) for (tp = first_tabpage; tp != NULL; tp = tp->tp_next)
@@ -563,6 +564,7 @@
#else
# define firstwin curwin
# define lastwin curwin
+# define ONE_WINDOW 1
# define W_NEXT(wp) NULL
# define FOR_ALL_WINDOWS(wp) wp = curwin;
# define FOR_ALL_TABPAGES(tp) for (;FALSE;)