flushes the image onto the display after it's done drawing. previous behaviour was to flush after a mouse event.

Reference: /n/sources/patch/applied/plot.flushimage
Date: Sat Oct 16 06:17:05 CES 2004

--- /sys/src/cmd/plot/plot.c	Sat Oct 16 06:17:05 2004
+++ /sys/src/cmd/plot/plot.c	Sat Oct 16 06:17:05 2004
@@ -191,6 +191,7 @@
 		process(bp);
 	}
 	closepl();
+	flushimage(display, 1);
 	for(;;){
 		m=emouse();
 		if(m.buttons&4 && emenuhit(3, &m, &menu)==0) exits(0);