Eliminate some newSV(0)s by merging the SV allocation with first modification.
-commit 77bac227771c643a8a6e305b2bac4665a8f772d1
+commit 77bac227771c643a8a6e305b2bac4665a8f772d1 # DOCed
Author: Nicholas Clark <nick@ccl4.org>
Date: Sun May 30 11:51:15 2010 +0100