Merge pull request #2048 from APriestman/addOctalComment

Ext4 - Add note that mode values are octal

tsk/fs/tsk_ext2fs.h

@@ -365,7 +365,7 @@ extern "C" {
         uint8_t eh_generation[4];       /* u32 */
     } ext2fs_extent_header;
 
-/* MODE */
+/* MODE - Note that values are in octal format */
 #define EXT2_IN_FMT  0170000
 #define EXT2_IN_SOCK 0140000
 #define EXT2_IN_LNK  0120000