Throws an error when I try to _read a large file
Good evening!
I use Kaitai to handle pcap files. And when I try to load 114 MB log:
`Pcap p = Pcap.fromFile("material\\log114MB.pcap");`
it throws 
```
Exception in thread "AWT-EventQueue-0" java.lang.OutOfMemoryError: Java heap space
	at com.company.EthernetFrame._read(EthernetFrame.java:65)
	at com.company.EthernetFrame.<init>(EthernetFrame.java:41)
	at com.company.Pcap$Packet._read(Pcap.java:283)
	at com.company.Pcap$Packet.<init>(Pcap.java:266)
	at com.company.Pcap._read(Pcap.java:164)
	at com.company.Pcap.<init>(Pcap.java:144)
	at com.company.Pcap.fromFile(Pcap.java:21)
	at com.company.View.toParseFromFile(View.java:180)
	at com.company.View.access$100(View.java:27)
	at com.company.View$1.mouseReleased(View.java:88)
```
However, when I load a 8 KB file, everything is fine. 

I tried to increase the max heap size using command line option to JVM. But increasing to some finite max value does not ultimately get rid of the issue.