message: ocl: update kernel global size adjustment
  Prevents 10000x1 => 10000x8 transformation after getContinuousSize() call
diff: @@ -2269,7 +2269,7 @@ bool Kernel::run(int dims, size_t _globalsize[], size_t _localsize[],
  return false;
  cl_command_queue qq = getQueue(q);
  - size_t offset[CV_MAX_DIM] = {0}, globalsize[CV_MAX_DIM] = {1,1,1};
  + size_t globalsize[CV_MAX_DIM] = {1,1,1};
  size_t total = 1;
  CV_Assert(_globalsize != 0);
  for (int i = 0; i < dims; i++)
  @@ -2278,15 +2278,16 @@ bool Kernel::run(int dims, size_t _globalsize[], size_t _localsize[],
  dims == 1 ? 64 : dims == 2 ? (i == 0 ? 256 : 8) : dims == 3 ? (8>>(int)(i>0)) : 1;
  CV_Assert( val > 0 );
  total *= _globalsize[i];
  - globalsize[i] = ((_globalsize[i] + val - 1)/val)*val;
  + if (_globalsize[i] == 1)
  + val = 1;
  + globalsize[i] = divUp(_globalsize[i], (unsigned int)val) * val;
  }
  - if( total == 0 )
  - return true;
  + CV_Assert(total > 0);
  if( p->haveTempDstUMats )
  sync = true;
  cl_event asyncEvent = 0;
  cl_int retval = clEnqueueNDRangeKernel(qq, p->handle, (cl_uint)dims,
  - offset, globalsize, _localsize, 0, 0,
  + NULL, globalsize, _localsize, 0, 0,
  sync ? 0 : &asyncEvent);
  #if CV_OPENCL_SHOW_RUN_ERRORS
  if (retval != CL_SUCCESS)
  