Fix a memory leak in maketable
Fix a memory leak in maketable

Originaly reported by Coverity

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