Signed-off-by: Michael Meeks <michael.meeks@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.cz>

Improves the commit d066f7e4 that
fixed crash when printing the bugdoc from i#103958

...in case osl_getProcessWorkingDir fails (e.g., if it has been unlinked).

Keep track of position of previous sorting column and use it to decide whether to duplicate invisible new sort column

so let's make the sal_intXY ugliness even a bit more ugly

This avoids comparison of raw values (ScDPItemData) during the 2nd sort.
Comparison of raw values can be expensive especially when the item sets mostly
consist of string values.

The old code relied on the order of initializing global static variables across
compilation units, which failed for MinGW cross compilation.  Cleaned up.