cmake: reset __content variable if file doesn't exist
authorAlexander Alekhin <alexander.alekhin@intel.com>
Mon, 12 Feb 2018 14:30:53 +0000 (17:30 +0300)
committerAlexander Alekhin <alexander.alekhin@intel.com>
Mon, 12 Feb 2018 14:30:53 +0000 (17:30 +0300)
commit14032c665335c69d7c9a9944a5be5cae14263324
tree2dd1c1a1b1eae76ee55d28aa0c538831ead9f22d
parent17233c687e2d51010dab2587f2532a460ccdb4b6
cmake: reset __content variable if file doesn't exist

Resolves CMake error after relaunch with updated source code:
Cannot find source file:
    modules/dnn/layers/layers_common.avx512_skx.cpp
cmake/OpenCVCompilerOptimizations.cmake