Remove virtual destructor from InstVisitor. This class should never be used through a base pointer/reference so inproper destruction should never be an issue. Removing this last virtual function also saves 4 bytes off each InstVisitor instance.
Remove virtual destructor from InstVisitor. This class should never be
used through a base pointer/reference so inproper destruction should
never be an issue. Removing this last virtual function also saves 4
bytes off each InstVisitor instance.


git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@13664 91177308-0d34-0410-b5e6-96231b3b80d8

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