sgs_(Force)HideThis [functions]

SGSBOOL sgs_HideThis( sgs_Context* C )

SGSBOOL sgs_ForceHideThis( sgs_Context* C )

Hide the 'this' variable, return if successful.

• sgs_ForceHideThis attempts to hide the first item on stack even if it didn't belong to the call, sgs_HideThis only does it if it belongs to the call and was hidden before.
• The hiding method is stack offset pointer shift.