MSHTML: Better QueryInterface implementation.

[Jacek Caban]

ChangeLog:
Better QueryInterface implementation.

 dlls/mshtml/htmlbody.c       |   14 +++++-------
 dlls/mshtml/htmlelem.c       |   50 ++++++++++++++++++++++++------------------
 dlls/mshtml/htmlinput.c      |   14 +++++-------
 dlls/mshtml/htmlnode.c       |   47 ++++++++++++++++++++++++---------------
 dlls/mshtml/htmlselect.c     |   14 +++++-------
 dlls/mshtml/htmltextarea.c   |   14 +++++-------
 dlls/mshtml/mshtml_private.h |    3 +++
 7 files changed, 83 insertions(+), 73 deletions(-)

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