updated for version 7.4.228
Problem:    Compiler warnings when building with Python 3.2.
Solution:   Make type cast depend on Python version. (Ken Takata)
Added tag v7-4-228 for changeset 3ee5808a293c
updated for version 7.4.229
Problem:    Using ":let" for listing variables and the second one is a curly
	    braces expression may fail.
Solution:   Check for an "=" in a better way. (ZyX)
Added tag v7-4-229 for changeset 839cca5ec18d