[Nano-devel] another patch update; positioning problem fixed?

[David Lawrence Ramsey]

Changes:

* put the sanity checks back in do_up() and do_down(); the lack of these was 
causing the segfault I encountered; I stupidly forgot that if the sanity check 
is only in actual_x_from_start(), then it will never be called when placewewant 
== 0

* after much hacking, I believe I have finally fixed the character positioning 
problem; when moving up or down, pico appears to retain the original column 
whenever possible, and if not, it goes to the closest possible column to the 
original column; I did the following in actual_x_from_start() to duplicate this:

- make sure i is in range (i. e. <= strlen(fileptr->data))
- if xpt(fileptr, i) is less than xplus, loop until it isn't or until i goes 
out of range
- otherwise, if xpt(fileptr, i) is greater than xplus, loop until it isn't or 
until i goes out of range
- make sure i is in range again

it appears to work so far in my preliminary tests; I'll keep testing it


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