update the log call deep

@@ -154,7 +154,7 @@ func (bl *BeeLogger) writerMsg(loglevel int, msg string) error {
 	lm := new(logMsg)
 	lm := new(logMsg)
 	lm.level = loglevel
 	lm.level = loglevel
 	if bl.enableFuncCallDepth {
 	if bl.enableFuncCallDepth {
-		_, file, line, ok := runtime.Caller(bl.loggerFuncCallDepth + 1)
+		_, file, line, ok := runtime.Caller(bl.loggerFuncCallDepth)
 		if ok {
 		if ok {
 			_, filename := path.Split(file)
 			_, filename := path.Split(file)
 			lm.msg = fmt.Sprintf("[%s:%d] %s", filename, line, msg)
 			lm.msg = fmt.Sprintf("[%s:%d] %s", filename, line, msg)