Cleanup line endings (#245)

The exact commands to make this commit were:

git reset --hard origin/master
find -type f |  # list all regular files
  grep -E '\.(h|cpp|fsh|vsh|mm)|LICENSE$' |  # filter for text files
  xargs -n 1 -P $(nproc) sed -i 's:\s*$::'  # for each file, trim trailing whitespace including the CR
git commit -a

source/Irrlicht/CImageWriterPNG.h

@@ -1,28 +1,28 @@
-// Copyright (C) 2002-2012 Nikolaus Gebhardt
-// This file is part of the "Irrlicht Engine".
-// For conditions of distribution and use, see copyright notice in irrlicht.h
-
-#pragma once
-
-#include "IImageWriter.h"
-
-namespace irr
-{
-namespace video
-{
-
-class CImageWriterPNG : public IImageWriter
-{
-public:
-	//! constructor
-	CImageWriterPNG();
-
-	//! return true if this writer can write a file with the given extension
-	bool isAWriteableFileExtension(const io::path& filename) const override;
-
-	//! write image to file
-	bool writeImage(io::IWriteFile *file, IImage *image, u32 param) const override;
-};
-
-} // namespace video
-} // namespace irr
+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#pragma once
+
+#include "IImageWriter.h"
+
+namespace irr
+{
+namespace video
+{
+
+class CImageWriterPNG : public IImageWriter
+{
+public:
+	//! constructor
+	CImageWriterPNG();
+
+	//! return true if this writer can write a file with the given extension
+	bool isAWriteableFileExtension(const io::path& filename) const override;
+
+	//! write image to file
+	bool writeImage(io::IWriteFile *file, IImage *image, u32 param) const override;
+};
+
+} // namespace video
+} // namespace irr