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slightly more robust joystick parsing

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

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

@@ -68,7 +68,6 @@

 	Kfn *kp;

 	j = 1;

-

 	for(;;){

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

 		if(n <= 0)

@@ -75,13 +74,18 @@

 			sysfatal("read: %r");

 		buf[n] = 0;

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

+		if(n <= 0)

+			continue;

 		k = 0;

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

 			s = down[n];

-			if(strcmp(s, "joy1") == 0)

-				j = 1;

-			else if(strcmp(s, "joy2") == 0)

-				j = 2;

+			if(strncmp(s, "joy", 3) == 0){

+				if(strcmp(s, "2 ") == 0)

+					j = 2;

+				else

+					j = 1;

+				continue;

+			}

 			for(kp=kkn.n; kp!=nil; kp=kp->n){

 				if(strcmp(kp->joyk, s) == 0)

 					k |= kp->k;