Fixing this_arg handling in opfunc_call_n.
Fixing this_arg handling in opfunc_call_n.

grgustaf/jerryscript,glistening/jerryscript,LaszloLango/jerryscript,bsdelf/jerryscript,grgustaf/jerryscript,loki04/jerryscript,jack60504/jerryscript,jerryscript-project/jerryscript,jack60504/jerryscript,LeeHayun/jerryscript,yichoi/jerryscript,zherczeg/jerryscript,zherczeg/jerryscript,slaff/jerryscript,martijnthe/jerryscript,dbatyai/jerryscript,tilmannOSG/jerryscript,bzsolt/jerryscript,martijnthe/jerryscript,martijnthe/jerryscript,bsdelf/jerryscript,loki04/jerryscript,gabrielschulhof/jerryscript,LaszloLango/jerryscript,glistening/jerryscript,dbatyai/jerryscript,zherczeg/jerryscript,bzsolt/jerryscript,LaszloLango/jerryscript,robertsipka/jerryscript,grgustaf/jerryscript,martijnthe/jerryscript,jack60504/jerryscript,zherczeg/jerryscript,glistening/jerryscript,tilmannOSG/jerryscript,akosthekiss/jerryscript,yichoi/jerryscript,LeeHayun/jerryscript,loki04/jerryscript,bzsolt/jerryscript,glistening/jerryscript,robertsipka/jerryscript,LeeHayun/jerryscript,martijnthe/jerryscript,bsdelf/jerryscript,bsdelf/jerryscript,slaff/jerryscript,akosthekiss/jerryscript,robertsipka/jerryscript,akosthekiss/jerryscript,glistening/jerryscript,yichoi/jerryscript,jerryscript-project/jerryscript,tilmannOSG/jerryscript,LeeHayun/jerryscript,gabrielschulhof/jerryscript,slaff/jerryscript,yichoi/jerryscript,akosthekiss/jerryscript,tilmannOSG/jerryscript,loki04/jerryscript,grgustaf/jerryscript,grgustaf/jerryscript,LeeHayun/jerryscript,robertsipka/jerryscript,jerryscript-project/jerryscript,martijnthe/jerryscript,jack60504/jerryscript,LaszloLango/jerryscript,bsdelf/jerryscript,gabrielschulhof/jerryscript,gabrielschulhof/jerryscript,dbatyai/jerryscript,jerryscript-project/jerryscript,jack60504/jerryscript,grgustaf/jerryscript,bzsolt/jerryscript,LaszloLango/jerryscript,akosthekiss/jerryscript,bzsolt/jerryscript,bsdelf/jerryscript,dbatyai/jerryscript,robertsipka/jerryscript,slaff/jerryscript,jack60504/jerryscript,yichoi/jerryscript,loki04/jerryscript,robertsipka/jerryscript,loki04/jerryscript,jerryscript-project/jerryscript,dbatyai/jerryscript,glistening/jerryscript,gabrielschulhof/jerryscript,slaff/jerryscript,zherczeg/jerryscript,tilmannOSG/jerryscript