comctl32: Remove redundant NULL checks before Free() calls

[Felix Nawothnig]

---
  dlls/comctl32/comboex.c       |   10 +++++-----
  dlls/comctl32/comctl32undoc.c |   10 ++++------
  dlls/comctl32/header.c        |   27 +++++++--------------------
  dlls/comctl32/listview.c      |    3 +--
  dlls/comctl32/monthcal.c      |    3 +--
  dlls/comctl32/propsheet.c     |    3 +--
  dlls/comctl32/syslink.c       |   26 +++++---------------------
  dlls/comctl32/tab.c           |    5 +----
  dlls/comctl32/treeview.c      |    5 ++---
  9 files changed, 27 insertions(+), 65 deletions(-)
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