Alignment error in class_addIvar

[James Cook]

Sorry not to use the tracker, but I have a simple-to-fix bug to report 
and didn't want to create yet another web account I'll probably never 
touch again.

There appears to be an error in 
./modules/core/base/Source/ObjectiveC2/runtime.c - specifically, the 
class_addIvar function.  When calculating an aligned offset for the new 
ivar, the offset is first right-shifted by the alignment but is only 
left-shifted again if the field is not already aligned.  The end result 
is that when adding an ivar that doesn't require any padding, the ivar 
will end up at an offset that overlaps something else.

The easiest fix would probably be to add a line "else off = off << 
alignment;" before "ivar->ivar_offset = off;" (which is line 186 in the 
svn version I'm looking at here).

-- James