multiway_merge.h: Destruct only elements that were have been constructed before.

multiway_merge.h: Destruct only elements that were have been constructed before.

2007-11-28  Johannes Singler  <singler@ira.uka.de>

        * include/parallel/multiway_merge.h: Destruct only elements that
        were have been constructed before. Code beautifying and formatting.
        * include/parallel/losertree.h: (Copy) construct all loser tree
        item keys, so they can be deconstructed all at once.
        * include/parallel/quicksort.h: Fix memory leak.
        * include/parallel/random_shuffle.h: Use copy constructor instead
        of assignment. Code beautifying and formatting.
        * include/parallel/unique_copy.h: Use assignment instead of copy
        constructor.
        * include/parallel/multiway_mergesort.h: Use copy constructor
        instead of assignment. Code beautifying and formatting.
        * include/parallel/random_shuffle.h: Use copy constructor instead
        of assignment. Code beautifying.

From-SVN: r130490