Error when expanding table by dragndrop

[yannrichet]

1. display a htable
2. extend its size (ie number of rows) with mouse
3. select a non empty cell
4. drag this cell toward bottom
5. release your mouse before the last row

get this "missing vlaue while TRUE/FALSE required" error :

Error in if (as.character(table[row, col]) != as.character(old)) { :
valeur manquante là où TRUE / FALSE est requis

also get Uncaught TypeError: Cannot read property 'hasOwnProperty' of undefined
in javascript console.