fix for more minor memory leaks

Now that some pointers have lost their const attribute, we can free their
associated memory when done with them.  This is more a correctness issue
about the rule for freeing those pointers which isn't completely trivial
more than the leak itself which didn't matter as the program is
exiting anyway.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

index-pack.c

@@ -815,6 +815,10 @@ int main(int argc, char **argv)
 	free(objects);
 	free(index_name_buf);
 	free(keep_name_buf);
+	if (pack_name == NULL)
+		free(curr_pack);
+	if (index_name == NULL)
+		free(curr_index);
 
 	return 0;
 }