Fixed bug when SysParam was used without a HttpContext.
Fixed bug when SysParam was used without a HttpContext.

timbrown81/Piranha,cnascimento/Piranha,truRating/Piranha,cnascimento/Piranha,PiranhaCMS/Piranha,PiranhaCMS/Piranha,DH0/Piranha,DH0/Piranha,timbrown81/Piranha,DH0/Piranha,cnascimento/Piranha,PiranhaCMS/Piranha,truRating/Piranha,truRating/Piranha,timbrown81/Piranha