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fixed bug in sed

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

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

@@ -688,9 +688,11 @@

 {

 	if (type == P_ARG)

 		prog.curr = name;

-	else if ((prog.bp = Bopen(name, OREAD)) == 0)

-		quit("Cannot open pattern-file: %s\n", name);

-	Blethal(prog.bp, nil);

+	else {

+		if ((prog.bp = Bopen(name, OREAD)) == 0)

+			quit("Cannot open pattern-file: %s\n", name);

+		Blethal(prog.bp, nil);

+	}

 	prog.type = type;

 }

-- 

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