that cause various problems, added "overload" directive so it gets
    overloaded next to the routines in the "math" unit) (based on patch
    by Alexander S. Klenin, mantis #13619)
  - removed "inline" from that function because all the reference increasing/
    decreasing in its body mainly cause code bloat and little if any speed
    increase

git-svn-id: trunk@13084 -