Fixed some golint warnings

main.go

@@ -209,7 +209,7 @@ func GetStatTimesFromDb(db *sql.DB, fromTime int64, keyMap map[uint8]string) []S
 	keyNums := GetKeyNumsFromKeyMap(keyMap)
 
 	// result
-	res := make([]StatForTime, 0)
+	var res []StatForTime
 	for rows.Next() {
 		err = rows.Scan(dest...)
 		if err != nil {

saving_test.go

@@ -9,7 +9,7 @@ import (
 )
 
 func GenerateRandStatsForTime(N int) []StatForTime {
-	data := make([]StatForTime, 0)
+	data := make([]StatForTime, N)
 	keyMap := GetKeymap()
 	rnd := rand.New(rand.NewSource(42))
 	for i := 0; i < N; i++ {