Fix reporting the last line on error if it doesn't end in \n.

If the last line of the file didn't end in LF, and an error was reported right in that line, two characters would be missing from that line in the output. Fixed.

main.py

@@ -30,8 +30,10 @@ VERSION = '0.2.0beta'
 
 
 def ReportError(script, e):
-    sys.stderr.write(script[fieldpos(script, '\n', e.lno):
-                            fieldpos(script, '\n', e.lno+1)-1] + '\n')
+    lastpos = fieldpos(script, '\n', e.lno+1)-1
+    assert lastpos != -1
+    if lastpos < -1: lastpos = len(script) # may hit EOF
+    sys.stderr.write(script[fieldpos(script, '\n', e.lno):lastpos] + '\n')
     sys.stderr.write(' ' * e.cno + '^\n')
     sys.stderr.write(e[0] + '\n')