makeRows in gRPC hander now handles a bool result

This PR adds bool support to the makeRows function
in the gRPC handler.

server/grpc.go

@@ -535,6 +535,13 @@ func makeRows(resp pilosa.QueryResponse) chan *pb.RowResponse {
 					Columns: []*pb.ColumnResponse{
 						&pb.ColumnResponse{ColumnVal: &pb.ColumnResponse_Uint64Val{Uint64Val: uint64(r)}},
 					}}
+			case bool:
+				ci := []*pb.ColumnInfo{{Name: "changed", Datatype: "bool"}}
+				results <- &pb.RowResponse{
+					Headers: ci,
+					Columns: []*pb.ColumnResponse{
+						&pb.ColumnResponse{ColumnVal: &pb.ColumnResponse_BoolVal{BoolVal: r}},
+					}}
 			default:
 				log.Printf("unhandled %T\n", r)
 				breakLoop = true

server/grpc_internal_test.go

@@ -204,6 +204,16 @@ func TestGRPC(t *testing.T) {
 					{uint64(123)},
 				},
 			},
+			// bool
+			{
+				true,
+				[]expHeader{
+					{"changed", "bool"},
+				},
+				[][]expColumn{
+					{true},
+				},
+			},
 		}
 
 		for ti, test := range tests {
@@ -242,6 +252,11 @@ func TestGRPC(t *testing.T) {
 						if val != v {
 							t.Fatalf("test %d expected column val: %v, but got: %v", ti, v, val)
 						}
+					case bool:
+						val := column.GetBoolVal()
+						if val != v {
+							t.Fatalf("test %d expected column val: %v, but got: %v", ti, v, val)
+						}
 					default:
 						t.Fatalf("test %d has unhandled data type: %T", ti, v)
 					}