Avoid needless allocation, thanks to Greg Stein's review of r7707:
Avoid needless allocation, thanks to Greg Stein's review of r7707:

* update.c (upd_change_xxx_prop): Don't make qval its own object, just
    do things by reference.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@850381 13f79535-47bb-0310-9956-ffa450edef68

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