Fix crasher in prim_file:internal_name2native

This BIF needs a redo

1. Figure out how it is supposed to work
2. Make it so.

It seems that this should be pretty much like
iolist_to_binary, except it also needs to 
encode the file name according to a local
os-specific encoding.

src/main/java/erjang/m/prim_file/Native.java

@@ -1,15 +1,20 @@
 package erjang.m.prim_file;
 
+import java.io.IOException;
+import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.List;
 
 import erjang.BIF;
+import erjang.CharCollector;
 import erjang.EBinary;
 import erjang.ENative;
 import erjang.EObject;
 import erjang.ERT;
 import erjang.ESeq;
+import erjang.ESmall;
 import erjang.EString;
+import erjang.driver.IO;
 
 public class Native extends ENative
 {
@@ -29,12 +34,41 @@ else if (arg.testBinary() != null) {
 			return new EBinary(outbytes);
 		}
 		else {
+			/*
+			try {
+				StringBuilder output = new StringBuilder();
+				CharCollector out = new CharCollector(IO.ISO_LATIN_1, output);
+				arg.collectCharList(out);
+				out.addInteger(0);
+				out.end();
+				return new EBinary(output.toString().getBytes(IO.ISO_LATIN_1));
+			} catch (Exception e) {
+				throw ERT.badarg();
+			}
+			*/
 			ESeq input = arg.testSeq();
 			List<Byte> bytes = new ArrayList<Byte>();
 			byte[] out;
 
+			ESeq all = input;
+
 			while (!input.isNil()) {
-				Integer el = input.head().testSmall().intValue();
+				EObject first = input.head();
+				ESmall small = first.testSmall();
+				if (small == null) {
+					EBinary bin = first.testBinary();
+					if (bin == null) {
+						// it doesn't look like an iolist to me...
+						throw ERT.badarg();
+					} else {
+						for (int i = 0; i < bin.byteSize(); i++) {
+							bytes.add(bin.byteAt(i));
+						}
+						input = input.tail();
+						continue;
+					}
+				}
+				Integer el = small.intValue();
 				bytes.add(el.byteValue());
 				input = input.tail();
 			}