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eui: fix off-by-one in joystick event processing

--- a/sys/src/games/eui.c

+++ b/sys/src/games/eui.c

@@ -72,8 +72,8 @@

 		n = read(0, buf, sizeof(buf) - 1);

 		if(n <= 0)

 			sysfatal("read: %r");

-		buf[n] = 0;

-		n = getfields(buf, down, nelem(down), 1, " ");

+		buf[n-1] = 0;

+		n = getfields(buf, down, nelem(down), 0, " ");

 		k = 0;

 		for(n--; n >= 0; n--){

 			s = down[n];

-- 

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