THRIFT-3467 Go Maps for Thrift Sets Should Have Values of Type struct{}
Client: Go
Patch: artem antonenko <sam901@yandex.ru>

This closes #976
diff --git a/test/go/src/common/printing_handler.go b/test/go/src/common/printing_handler.go
index 5fe3d53..afee8da 100644
--- a/test/go/src/common/printing_handler.go
+++ b/test/go/src/common/printing_handler.go
@@ -188,7 +188,7 @@
 //
 // Parameters:
 //  - Thing
-func (p *printingHandler) TestSet(thing map[int32]bool) (r map[int32]bool, err error) {
+func (p *printingHandler) TestSet(thing map[int32]struct{}) (r map[int32]struct{}, err error) {
 	fmt.Printf("testSet({")
 	first := true
 	for k, _ := range thing {