[StGit] Issue when using custom --prefix on 64bit-system

Hi there,

unless I'm doing something wrong (using "make prefix=$HOME/...  
install"), I think stg has a small glitch on some lib64-systems.

For me it complains that it can't find stgit.main, which is no surprise, 
since the sys.path only contains the 'lib' subdirs added in lines 
34-36, while for me the stgit-libs where installed in $PREFIX/lib64 
(this is on Gentoo AMD64 stable).

The simple fix would be to just extend the local_path with the same 
entries with "lib64", but I'm sure there is a better way ;)

Greetings,
Jojo

-- 
Johannes Gilger [off-list ref]
http://heipei.net
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