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fixed fread

--- a/sys/src/ape/lib/ap/stdio/fread.c

+++ b/sys/src/ape/lib/ap/stdio/fread.c

@@ -20,7 +20,7 @@

 			memcpy(s, f->rp, d);

 			f->rp+=d;

 		}else{

-			if(n >= BIGN && f->state==RD && !(f->flags&STRING) && f->buf!=f->unbuf){

+			if(n >= BIGN && f->state==RD && !(f->flags&STRING) && f->buf!=f->unbuf || f->buf == f->unbuf){

 				d=read(f->fd, s, n);

 				if(d<=0){

 					f->state=(d==0)?END:ERR;

-- 

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