exp/ssa: silence go vet

R=adonovan
CC=golang-dev
https://golang.org/cl/7386052

src/pkg/exp/ssa/interp/interp.go

@@ -586,7 +586,7 @@ func Interpret(mainpkg *ssa.Package, mode Mode, filename string, args []string)
 		case string:
 			fmt.Fprintln(os.Stderr, "panic:", p)
 		default:
-			fmt.Fprintln(os.Stderr, "panic: unexpected type: %T", p)
+			fmt.Fprintf(os.Stderr, "panic: unexpected type: %T\n", p)
 		}
 
 		// TODO(adonovan): dump panicking interpreter goroutine?

src/pkg/exp/ssa/interp/reflect.go

@@ -233,7 +233,7 @@ func ext۰reflect۰Value۰Len(fn *ssa.Function, args []value) value {
 	case map[value]value:
 		return len(v)
 	default:
-		panic(fmt.Sprintf("reflect.(Value).Len(%V)", v))
+		panic(fmt.Sprintf("reflect.(Value).Len(%v)", v))
 	}
 	return nil // unreachable
 }

src/pkg/exp/ssa/literal.go

@@ -9,7 +9,10 @@ import (
 	"strconv"
 )
 
-var complexZero = types.Complex{new(big.Rat), new(big.Rat)}
+var complexZero = types.Complex{
+	Re: new(big.Rat),
+	Im: new(big.Rat),
+}
 
 // newLiteral returns a new literal of the specified value and type.
 // val must be valid according to the specification of Literal.Value.