Fix specs for rb_scan_args with changes introduced in 2.1.
Fix specs for rb_scan_args with changes introduced in 2.1.

ruby/rubyspec,lucaspinto/rubyspec,kidaa/rubyspec,eregon/rubyspec,sgarciac/spec,wied03/rubyspec,iliabylich/rubyspec,iliabylich/rubyspec,kidaa/rubyspec,kachick/rubyspec,bl4ckdu5t/rubyspec,jannishuebl/rubyspec,ruby/spec,jannishuebl/rubyspec,askl56/rubyspec,ruby/spec,sgarciac/spec,benlovell/rubyspec,yous/rubyspec,eregon/rubyspec,askl56/rubyspec,bl4ckdu5t/rubyspec,BanzaiMan/rubyspec,kachick/rubyspec,wied03/rubyspec,ruby/spec,kachick/rubyspec,sgarciac/spec,wied03/rubyspec,nobu/rubyspec,lucaspinto/rubyspec,nobu/rubyspec,ruby/rubyspec,nobu/rubyspec,BanzaiMan/rubyspec,benlovell/rubyspec,yous/rubyspec,eregon/rubyspec