Fix comment copy-paste error, as found by greenya

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3386 dfc29bdd-3216-0410-991c-e03cc46cb475

include/IFileList.h

@@ -45,7 +45,7 @@ public:
 	//! Returns the file offset of a file in the file list, based on an index.
 	/** \param index is the zero based index of the file which should be returned.
 	The index must be less than the amount getFileCount() returns.
-	\return The size of the file in bytes. */
+	\return The offset of the file in bytes. */
 	virtual u32 getFileOffset(u32 index) const = 0;
 
 	//! Returns the ID of a file in the file list, based on an index.