Add comment about strange color conversions also to CColorConverter.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5116 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CColorConverter.h

@@ -48,8 +48,10 @@ public:
 	static void convert32BitTo32Bit(const s32* in, s32* out, s32 width, s32 height, s32 linepad, bool flip=false);
 
 
-	//! functions for converting one image format to another efficiently
+	//! Functions for converting one image format to another efficiently
 	//! and hopefully correctly.
+	//! Note that the format descriptions refer to the ECOLOR_FORMAT's and not to memory layout.
+	//! Reasons for that go back to DX9 naming which tended to flip 32-bit and 16-bit byte orders so ARGB usually means BGRA.
 	//!
 	//! \param sP pointer to source pixel data
 	//! \param sN number of source pixels to copy