another pre-ANSI bit

another pre-ANSI bit

     Another vintage compiler (not as old as the previous one...) didn't
like the assignment `nlp = shkgeneral;' when nlp had been declared using
array syntax.  It didn't used to mind that, until an extra `const' was
inserted by the "move stuff to read-only area" patch submitted by someone
a while back.  The prototype is already using pointer syntax here.