Int 62 Fn 004F  u - Fdgriver V3.03 - "fg_inside" - Check If Point Inside   [V]

   AX = 004Fh
   ES:BX -> vertex array
   CX = number of vertices
   DX = screen space column of point to test
   SI = screen space row of point to test

Return: AX = result
       0000h point is outside polygon
       0001h point is inside polygon
       undefined if not a convex polygon

Note:  For FGDRIVER v1.10, this function was "FG_DISPFILE" (see AX=0018h);
     "FG_INSIDE" did not exist yet

See Also: AX=0078h,AX=0079h,AX=007Ah