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libdraw: remove unneeded check (thanks BurnZeZ)

--- a/sys/src/libdraw/init.c

+++ b/sys/src/libdraw/init.c

@@ -228,8 +228,6 @@

 		werrstr("initdisplay: %s: %r", buf);

 		return nil;

 	}

-	if(ctlfd < 0)

-		goto Error1;

 	if((n=read(ctlfd, info, sizeof info)) < 12){

     Error2:

 		close(ctlfd);

-- 

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