message: ts: silence zero memory usage messages
diff: @@ -790,8 +790,11 @@ void testTearDown()
  {
  size_t peak = malloc_peak();
  memory_usage = peak - memory_usage_base;
  + if (peak > 0)
  + {
  CV_LOG_INFO(NULL, "Memory_usage (malloc): " << memory_usage << " (base=" << memory_usage_base << ")");
  }
  + }
  {
  // core/src/alloc.cpp: #define OPENCV_ALLOC_ENABLE_STATISTICS
  // handle large buffers via fastAlloc()
  @@ -799,7 +802,10 @@ void testTearDown()
  cv::utils::AllocatorStatisticsInterface& ocv_stats = cv::getAllocatorStatistics();
  ocv_peak = ocv_stats.getPeakUsage();
  ocv_memory_usage = ocv_peak - memory_usage_base_opencv;
  + if (ocv_peak)
  + {
  CV_LOG_INFO(NULL, "Memory_usage (OpenCV): " << ocv_memory_usage << " (base=" << memory_usage_base_opencv << " current=" << ocv_stats.getCurrentUsage() << ")");
  + }
  if (memory_usage == 0) // external profiler has higher priority (and accuracy)
  memory_usage = ocv_memory_usage;
  }
  @@ -809,7 +815,10 @@ void testTearDown()
  cv::utils::AllocatorStatisticsInterface& ocl_stats = cv::ocl::getOpenCLAllocatorStatistics();
  ocl_peak = ocl_stats.getPeakUsage();
  ocl_memory_usage = ocl_peak - memory_usage_base_opencl;
  + if (ocl_memory_usage > 0)
  + {
  CV_LOG_INFO(NULL, "Memory_usage (OpenCL): " << ocl_memory_usage << " (base=" << memory_usage_base_opencl << " current=" << ocl_stats.getCurrentUsage() << ")");
  + }
  ::testing::Test::RecordProperty("ocl_memory_usage",
  cv::format("%llu", (unsigned long long)ocl_memory_usage));
  }
  