dct32x32_test: drop '_t' from local typenames

_t is reserved by posix

+ switch to camelcase
  http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml#Type_Names

Change-Id: Ie1918d93c0a0d7a854e88b5a77b8c21b4cdc28b7
1 file changed