lou_backTranslateString.c fix

This commit fixes back translation problems when words gets split in
unusual places causeing back translation of whole words for example K5
back translates to Knowledgeen, M>k back translates to Moreark, and M5
back translates to Moren.  This caused over 8400 extra back
translation problems.
Merge pull request #12 from krperry/master

lou_backTranslateString.c fix