Return a const& from CompressedImage[View]::size() as well.

Ahem, missed those in 36ee7835d6. Yes,
putting compressed images into atlases is a desirable thing to do as
well, although it's now rather shitty due to lack of slicing.

doc/changelog.dox

@@ -331,10 +331,10 @@ See also:
 -   @ref MeshIndexType was enlarged to 32 bits and can now wrap
     implementation-specific values similar to @ref PixelFormat,
     @ref CompressedPixelFormat, @ref VertexFormat and @ref MeshPrimitive
--   @ref Image::size(), @ref ImageView::size() as well as
-    @ref Trade::ImageData::size() now return a @cpp const& @ce instead of a
-    value to allow creating a @relativeref{Corrade,Containers::StridedArrayView}
-    slice onto this member.
+-   @ref Image::size(), @ref CompressedImage::size(), @ref ImageView::size(),
+    @ref CompressedImageView::size() as well as @ref Trade::ImageData::size()
+    now return a @cpp const& @ce instead of a value to allow creating a
+    @relativeref{Corrade,Containers::StridedArrayView} slice onto this member.
 
 @subsubsection changelog-latest-changes-debugtools DebugTools library
 

src/Magnum/Image.h

@@ -620,7 +620,7 @@ template<UnsignedInt dimensions> class CompressedImage {
         CompressedPixelFormat format() const { return _format; }
 
         /** @brief Image size in pixels */
-        VectorTypeFor<dimensions, Int> size() const { return _size; }
+        const VectorTypeFor<dimensions, Int>& size() const { return _size; }
 
         /**
          * @brief Compressed image data properties
@@ -695,7 +695,7 @@ template<UnsignedInt dimensions> class CompressedImage {
 
         CompressedPixelStorage _storage;
         CompressedPixelFormat _format;
-        Math::Vector<Dimensions, Int> _size;
+        VectorTypeFor<dimensions, Int> _size;
         Containers::Array<char> _data;
 };
 

src/Magnum/ImageView.h

@@ -776,7 +776,7 @@ template<UnsignedInt dimensions, class T> class CompressedImageView {
         CompressedPixelFormat format() const { return _format; }
 
         /** @brief Image size in pixels */
-        constexpr VectorTypeFor<dimensions, Int> size() const { return _size; }
+        constexpr const VectorTypeFor<dimensions, Int>& size() const { return _size; }
 
         /**
          * @brief Compressed image data properties
@@ -822,7 +822,7 @@ template<UnsignedInt dimensions, class T> class CompressedImageView {
 
         CompressedPixelStorage _storage;
         CompressedPixelFormat _format;
-        Math::Vector<Dimensions, Int> _size;
+        VectorTypeFor<dimensions, Int> _size;
         Containers::ArrayView<Type> _data;
 };