[scorched3d/f16] (18 commits) ...Update to upstream 43.3d

[Bruno Wolff III]

Summary of changes:

  c44211b... Rebuild for libpng 1.5 (*)
  59cb001... Access png struct elements through accessors (*)
  c8336a5... Replace some more direct png struct references with accesso (*)
  b3ff498... Replace another direct png reference with an accessor (*)
  1d511c1... Fix spelling of palette (*)
  f3b0357... Fix another palette misspelling (*)
  6d9903a... The fix for using the palette through accessors needed fixi (*)
  17d0719... num_palette really should be int (*)
  09f11fe... num_palette needs to be a pointer to an int, not an int (*)
  cf46693... Bump the release since the previous version was built even  (*)
  a08ad9e... It now looks like int num_palette was OK. (*)
  c4571fb... libpng may be expected to allocate png_palette (*)
  f03472a... It's a bad idea to use png_* for variable names (*)
  5d1ffc7... bit_depth* was not a cast - oops (*)
  e36c040... - Rebuilt for https://fedoraproject.org/wiki/Fedora_17_Mass (*)
  e8b21ad... Fix building with gcc-4.7 (*)
  fece41a... 43.3. (*)
  2b70352... Update to upstream 43.3d (*)

(*) This commit already existed in another branch; no separate mail sent