First pass at proper bunzip2 command line handling.
diff --git a/lib/lib.c b/lib/lib.c
index 81c989a..4b87f8c 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -575,7 +575,7 @@
 {
   close(fdin);
   close(fdout);
-  unlink(*tempname);
+  if (*tempname) unlink(*tempname);
   tempfile2zap = (char *)1;
   free(*tempname);
   *tempname = NULL;