Reduced memory leak

Reduced memory leak

 133366 words of node memory still in use:
   21 hlist, 2 vlist, 6 rule, 5 glue, 6 kern, 4 penalty, 2 glyph, 63125 attribut
e, 50 glue_spec, 3075 attribute_list, 3 action, 1 write, 1 pdf_literal, 1 pdf_se
tmatrix, 2 pdf_save, 2 pdf_restore, 37 user_defined nodes
   avail lists: 1:8,2:185249,3:3623,4:19052