updated for version 7.3.977
Problem:    Compiler warnings on 64 bit Windows.
Solution:   Add type casts. (Mike Williams)  Also fix some white space and
	    uncomment what was commented-out for testing.
Added tag v7-3-977 for changeset 21e13403140a
updated for version 7.3.978
Problem:    Regexp debug logs don't have a good name.
Solution:   Use clear names and make it possible to write logs for the old and
	    new engines separately. (Taro Muraoka)
Added tag v7-3-978 for changeset fe8a0a6a1c2a
updated for version 7.3.979
Problem:    Complex NFA regexp doesn't work.
Solution:   Set actual state stack end instead of using an arbitrary number.
	    (Yasuhiro Matsumoto)
Added tag v7-3-979 for changeset a63361b90979
updated for version 7.3.980
Problem:    Regexp logs may contain garbage. Character classes don't work
	    correctly for multi-byte characters.
Solution:   Check for end of post list.  Only use "is" functions for
	    characters up to 255. (Ken Takata)
Added tag v7-3-980 for changeset c83656c9745a
updated for version 7.3.981
Problem:    In the old regexp engine \i, \I, \f and \F don't work on
	    multi-byte characters.
Solution:   Dereference pointer properly.
Added tag v7-3-981 for changeset 4ff8fa416a0d