fix: clipped import of banks

Fixes remy/vscode-nextbasic#65

__tests__/bas2txt.test.mjs

@@ -77,3 +77,10 @@ test('else if (2.08)', (t) => {
   res = line2txt(src.basic); // to text
   t.is(res, text, 'new IF correctly rendered');
 });
+
+test('lines are not being clipped', async (t) => {
+  const src = await readFile(__dirname + '/fixtures/clipped-lines.bnk');
+  const lines = file2txt(src).split('\n').filter(Boolean);
+
+  t.is(lines.length, 4);
+});

bas2txt.mjs

@@ -64,7 +64,12 @@ export function bas2txt(data) {
     C$checksum`
   );
 
-  let txt = bas2txtLines(data.slice(unpack.offset, 128 + header.hFileLength));
+  // if hType is 0, then we're a type of program, so it's possible
+  // there's variables at the end of the file (as defined by hOffset)
+  // otherwise, the hFileLength is the length of the file
+  const length = header.hType === 0 ? header.hOffset : header.hFileLength;
+
+  let txt = bas2txtLines(data.slice(unpack.offset, 128 + length));
 
   if (
     header.autostart &&