pack_disjuncts_dup(): Minor changes
pack_disjuncts_dup(): Minor changes

1. Function comment: Now we have more than one argument.
2. The localization of "cblock" most probably doesn't contribute to
optimization, since pack_connectors_dup() is inlined and is it doesn't
contain functions from other files. But this assignment is till
convenient.
3. Move the "originating_gword" assignment up, for clarity.

opencog/link-grammar,ampli/link-grammar,ampli/link-grammar,ampli/link-grammar,linas/link-grammar,ampli/link-grammar,linas/link-grammar,opencog/link-grammar,ampli/link-grammar,opencog/link-grammar,opencog/link-grammar,ampli/link-grammar,opencog/link-grammar,linas/link-grammar,ampli/link-grammar,ampli/link-grammar,linas/link-grammar,opencog/link-grammar,opencog/link-grammar,opencog/link-grammar,ampli/link-grammar,linas/link-grammar,linas/link-grammar,linas/link-grammar,linas/link-grammar,linas/link-grammar,opencog/link-grammar