This function remeasures dropabbles in case they were redimensioned after the dropabble was set up.

The function is broken when called in case you have sortables (which are also dropabbles).

By looking at the code I figured there were two lines that use an 'elm' var, that is not defined inside the scope of this function, so it gives an error. Those lines are only run when you have a sortable. The lines are really strange, and don't seem to have any use. I don't know what the author meant with them, maybe they were misplaced there by mistake.

Deleting those two lines does the trick and the function is working (at least in my use case). So I am sending a patch for it.