updated for version 7.4.538
Problem:    Tests fail with small features plus Python.
Solution:   Disallow weird combination of options.  Do not set "fdm" when
	    folding is disabled.
Added tag v7-4-538 for changeset 3421b24e419c
updated for version 7.4.539
Problem:    Crash when computing buffer count.  Problem with range for user
	    commands.  Line range wrong in Visual area.
Solution:   Avoid segfault in compute_buffer_local_count().  Check for
	    CMD_USER when checking type of range. (Marcin Szamotulski)
Added tag v7-4-539 for changeset 77fe94082f53
updated for version 7.4.540
Problem:    Cannot build with tiny and small features. (Taro Muraoka)
Solution:   Add #ifdef around CMD_USER.
Added tag v7-4-540 for changeset 93aca8cdd7b8