mtdchar major , 90 or 91?

[Nikolai Vladychevski]

Why in MAKEDEV the char device has major 90 and in mtdchar.c it has 
redefined from 90 to 91 in one of the first lines of code: 

#undef MTD_CHAR_MAJOR
#define MTD_CHAR_MAJOR 91 

I had to comment this definition in order to recognize /dev/mtd0 in the doc 
millenium ....  this is strange, why this numbers change from place to 
place? 

Nikolai
p.s.
I downloaded lastests release 2 days ago from cvs