message: Fix release-only warnings.
diff: #include <image/Image.h>
  #include <image/LinearImage.h>
  +#include <utils/compiler.h>
  +
  #include <math/scalar.h>
  #include <math/vec3.h>
  #include <math/vec4.h>
  @@ -206,7 +208,7 @@ std::unique_ptr<uint8_t[]> fromLinearTosRGB(const LinearImage& image) {
  using math::float3;
  size_t w = image.getWidth();
  size_t h = image.getHeight();
  - size_t channels = image.getChannels();
  + UTILS_UNUSED_IN_RELEASE size_t channels = image.getChannels();
  assert(channels >= 3);
  std::unique_ptr<uint8_t[]> dst(new uint8_t[w * h * 3 * sizeof(T)]);
  T* d = reinterpret_cast<T*>(dst.get());
  @@ -229,7 +231,7 @@ std::unique_ptr<uint8_t[]> fromLinearToRGB(const LinearImage& image) {
  using math::float3;
  size_t w = image.getWidth();
  size_t h = image.getHeight();
  - size_t channels = image.getChannels();
  + UTILS_UNUSED_IN_RELEASE size_t channels = image.getChannels();
  assert(channels >= 3);
  std::unique_ptr<uint8_t[]> dst(new uint8_t[w * h * 3 * sizeof(T)]);
  T* d = reinterpret_cast<T*>(dst.get());
  @@ -252,7 +254,7 @@ std::unique_ptr<uint8_t[]> fromLinearToRGBM(const LinearImage& image) {
  using namespace math;
  size_t w = image.getWidth();
  size_t h = image.getHeight();
  - size_t channels = image.getChannels();
  + UTILS_UNUSED_IN_RELEASE size_t channels = image.getChannels();
  assert(channels >= 3);
  std::unique_ptr<uint8_t[]> dst(new uint8_t[w * h * 4 * sizeof(T)]);
  T* d = reinterpret_cast<T*>(dst.get());
  