Pop cursor state from the stack.
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 Syntax

        GT_POPCUR() -> <nOldState>

 Arguments:

 Returns:

      <nOldState> is the state of the cursor before any changes are
      applied.

 Description:

      This function pops the current cursor state off a stack, having
      previously been placed there by calling GT_PUSHCUR().

      This is used to restore the cursor shape after a temporary change.

      It is important to pop the stack as many times as you push it,
      otherwise you may get the wrong cursor shape back.

 Examples:

      GT_PUSHCUR(SC_NONE)   // push cursor and turn it off
        ..code..            // do something, maybe display a message
        ...
      GT_POPCUR()           // restore cursor

 Header File: SETCURS.CH  GT_LIB.CH

 Source: GTCURS.PRG

 Author:  Philip Ide