[avr-gcc-list] Register usage for parameter passing

[Larry Barello]

Last year, passing a single char parameter between routines,
was done in R25.

There was some talk of changing it to R24 so that parameters
were aligned on word boundaries (e.g. char = R24, int =
R24:25, long = R22-25) etc.  This was to accommodate the new
AVR cores and various multiply instructions (or something
like that).

It appears that indeed this change occured, but the
CtoAsm.inc file in the library source doesn't reflect this.

Is that an oversight, or am I looking in the right place?