Fix invert under MSVC
Fix ocl::dft error when program end on Linux
Merge branch '2.4_fixFft' of https://github.com/bitwangyaoyao/opencv into 2.4
Fix ocl::dft the compile warning on Linux
Merge pull request #555 from bitwangyaoyao:2.4_fixFft
Merge pull request #552 from taka-no-me:fix_invert