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rio: kbdtap style tweak

--- a/sys/src/cmd/rio/rio.c

+++ b/sys/src/cmd/rio/rio.c

@@ -393,32 +393,16 @@

 	threadsetname("keyboardtap");

 	enum { Awin, Actl, Afrom, Adev, Ato, Ainp, Awatch, NALT };

-	static Alt alts[NALT+1];

-	/* ctl */

-	alts[Awin].c = wintap;

-	alts[Awin].v = &w;

-	alts[Awin].op = CHANRCV;

-	alts[Actl].c = ctltap;

-	alts[Actl].v = &ctl;

-	alts[Actl].op = CHANRCV;

-	/* kbd input */

-	alts[Afrom].c = fromtap;

-	alts[Afrom].v = &s;

-	alts[Afrom].op = CHANRCV;

-	alts[Adev].c = kbdchan;

-	alts[Adev].v = &s;

-	alts[Adev].op = CHANRCV;

-	/* kbd output */

-	alts[Ato].c = totap;

-	alts[Ato].v = &s;

-	alts[Ato].op = CHANNOP;

-	alts[Ainp].c = nil;

-	alts[Ainp].v = &s;

-	alts[Ainp].op = CHANNOP;

-	alts[Awatch].c = totap;

-	alts[Awatch].v = &watched;

-	alts[Awatch].op = CHANNOP;

-	alts[NALT].op = CHANEND;

+	Alt alts[NALT+1] = {

+		[Awin]	{.c = wintap, .v = &w, .op = CHANRCV},

+		[Actl]	{.c = ctltap, .v = &ctl, .op = CHANRCV},

+		[Afrom]	{.c = fromtap, .v = &s, .op = CHANRCV},

+		[Adev]	{.c = kbdchan, .v = &s, .op = CHANRCV},

+		[Ato]	{.c = totap, .v = &s, .op = CHANNOP},

+		[Ainp]	{.c = nil, .v = &s, .op = CHANNOP},

+		[Awatch]{.c = totap, .v = &watched, .op = CHANNOP},

+		[NALT]	{.op = CHANEND},

+	};

 	cur = nil;

 	watched = nil;