最新版（1.7.5）打印null字符串还是报 NullPointerException

[lmk26]

最新版（1.7.5）打印null字符串还是报错。

java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
	at com.apkfuns.logutils.Logger.logString(Logger.java:107)
	at com.apkfuns.logutils.Logger.logString(Logger.java:75)
	at com.apkfuns.logutils.Logger.i(Logger.java:256)
	at com.apkfuns.logutils.LogUtils.i(LogUtils.java:71)