Fix set_write_value in w_attrsetval_templ.h
set_write_value templates with vector is rewritten to use the << operator that allows to work with vector and vector, while the constructor for the arrays doesn't allow it.
Fix #1256
set_write_value templates with vector is rewritten to use the << operator that allows to work with vector and vector, while the constructor for the arrays doesn't allow it.
Fix #1256