cpplib: double speed of comment skipping

[Neil Booth]

Zack Weinberg wrote:-

> > +      else if (c == '/')
> > +	{
> > +	  /* Avoid false positives for the comment's initial '*'.  */
> > +	  if (cur[-2] == '*' && cur - 2 >= CPP_BUFFER (pfile)->cur)
> > +	    goto out;
> 
> I believe you can avoid the extra check by changing the FORWARD(1) at
> the beginning, to FORWARD(2).  I'll test the patch with that change
> made.

Hmmm.  What if the character after the "/*" is a '\n' or '\r'?

Neil.