Fix unintended BC issues in ISO option refactoring

builder/qemu/builder.go

@@ -21,10 +21,10 @@ import (
 const BuilderId = "transcend.qemu"
 
 var accels = map[string]struct{}{
-	"none": {},
-	"kvm":  {},
-	"tcg":  {},
-	"xen":  {},
+	"none": struct{}{},
+	"kvm":  struct{}{},
+	"tcg":  struct{}{},
+	"xen":  struct{}{},
 }
 
 var netDevice = map[string]bool{

builder/qemu/builder_test.go

@@ -497,7 +497,7 @@ func TestBuilderPrepare_QemuArgs(t *testing.T) {
 
 	// Test with a good one
 	config["qemuargs"] = [][]interface{}{
-		{"foo", "bar", "baz"},
+		[]interface{}{"foo", "bar", "baz"},
 	}
 
 	b = Builder{}
@@ -510,7 +510,7 @@ func TestBuilderPrepare_QemuArgs(t *testing.T) {
 	}
 
 	expected := [][]string{
-		{"foo", "bar", "baz"},
+		[]string{"foo", "bar", "baz"},
 	}
 
 	if !reflect.DeepEqual(b.config.QemuArgs, expected) {