[RFA2] Follow-up decode_line_1 crash

[Keith Seitz]

> > Patch:
> > 
[snip]

I forgot to post the ChangeLog (which probably requires comments):

2001-03-14  Keith Seitz  <keiths@cygnus.com>

	* linespec.c (decode_line_1): Skip argptr over a leading
	double quote. Prevents alloc of 0 bytes and memcpy of -1 bytes.

Keith