fixed bugs in lou_backTranslateString.c
fixed bugs in lou_backTranslateString.c

liblouis/liblouis,IndexBraille/liblouis,hammera/liblouis,liblouis/liblouis,IndexBraille/liblouis,vsmontalvao/liblouis,hammera/liblouis,hammera/liblouis,BueVest/liblouis,vsmontalvao/liblouis,vsmontalvao/liblouis,IndexBraille/liblouis,BueVest/liblouis,BueVest/liblouis,IndexBraille/liblouis,vsmontalvao/liblouis,BueVest/liblouis,hammera/liblouis,BueVest/liblouis,liblouis/liblouis,IndexBraille/liblouis,BueVest/liblouis,hammera/liblouis,liblouis/liblouis,hammera/liblouis,liblouis/liblouis,vsmontalvao/liblouis,liblouis/liblouis