message: ocl: fix program cache key
diff: @@ -174,24 +174,6 @@ static uint64 crc64( const uchar* data, size_t size, uint64 crc0=0 )
  return ~crc;
  }
  -struct HashKey
  -{
  - typedef uint64 part;
  - HashKey(part _a, part _b) : a(_a), b(_b) {}
  - part a, b;
  -};
  -
  -inline bool operator == (const HashKey& h1, const HashKey& h2)
  -{
  - return h1.a == h2.a && h1.b == h2.b;
  -}
  -
  -inline bool operator < (const HashKey& h1, const HashKey& h2)
  -{
  - return h1.a < h2.a || (h1.a == h2.a && h1.b < h2.b);
  -}
  -
  -
  bool haveOpenCL()
  {
  #ifdef HAVE_OPENCL
  @@ -1351,7 +1333,7 @@ struct Context::Impl
  const String& buildflags, String& errmsg)
  {
  size_t limit = getProgramCountLimit();
  - String key = Program::getPrefix(buildflags);
  + String key = cv::format("codehash=%08llx ", src.hash()) + Program::getPrefix(buildflags);
  {
  cv::AutoLock lock(program_cache_mutex);
  phash_t::iterator it = phash.find(key);
  