🚀 go-pugleaf

I haven't seen any bug fixes to f77 since we've installed Don Seeley's version
late last year.  Pardon me if I've missed this one.

Description:
	The f77 VAX code generator creates illegal instructions ("cvtll")
	whenever the target of an 'assign' statement is an integer*2
	variable.

Repeat-by:
	Run the following program through the f77 compiler:

	integer*2 i
	assign 10 to i
	goto i
10	continue
	end

	The assembler reports an error of this form: 
Assembler:
"/tmp/fortxxxxx.s", line 21: "cvtll" is not followed by a ':' for a label definition

Fix:
	1. Don't use integer*2 variables as targets of 'assign' statements.
	2. Wait for someone to post a fix to the f77 VAX code generator.

Bill Vaughn
Univ. of Rochester
{allegra,seismo,decvax}!rochester!ur-cvsvax!bill