NPE when no Javascript engine is available

[philippecade]

A NullPointerException happens when no Javascript engine is available.

Caused by: java.lang.NullPointerException: Cannot invoke "String.split(String)" because "parseResult" is null
	at com.btr.proxy.selector.pac.PacProxySelector.findProxy(PacProxySelector.java:129)
	at com.btr.proxy.selector.pac.PacProxySelector.select(PacProxySelector.java:110)
	at com.btr.proxy.selector.misc.BufferedProxySelector.select(BufferedProxySelector.java:84)
	at com.btr.proxy.selector.misc.ProxyListFallbackSelector.select(ProxyListFallbackSelector.java:71)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1232)
	at java.base/sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1128)
	at java.base/sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:175)
	at java.base/sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:142)