Don't use fallthrough in a type switch.

R=rsc http://go/go-review/1018005

Don't use fallthrough in a type switch.
R=rsc http://go/go-review/1018005
b534eb46 · Ian Lance Taylor · fb12ad06 · b534eb46
Commit b534eb46 authored Oct 30, 2009 by Ian Lance Taylor
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world.go src/pkg/exp/eval/world.go +2 -4

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--- a/src/pkg/exp/eval/world.go
+++ b/src/pkg/exp/eval/world.go
@@ -111,12 +111,10 @@ func (w *World) CompileExpr(e ast.Expr) (Code, os.Error) {
 		// nothing
 	case *idealFloatType:
 		// nothing
-	case *MultiType:
+	default:
-		if len(t.Elems) == 0 {
+		if tm, ok := t.(*MultiType); ok && len(tm.Elems) == 0 {
 			return &stmtCode{w, code{ec.exec}}, nil;
 		}
-		fallthrough;
-	default:
 		eval = genAssign(ec.t, ec);
 	}
 	return &exprCode{w, ec, eval}, nil;