unifying some declarations in edit dir

[vit_r]

Example

replacing

    int line
    int start_line

by

    long line
    long start_line

Note

'long' because of edit/edit-widget.h:
long total_lines; /* total lines in the file */, etc

would be better 'off_t', meanwhile majority is still 'long'.

So,

If dev-team will decide to re-declare lines
it will be easier when they are unified, isn't so ?

The other point (its my opinion):

There are similar 'int line, int col' for widgets
Would be better to call them somehow different
May be 'int wline, int wcol', at least

[vit_r]

some trivial corrections in edit dir