[Patch, fortran] PR19262 more than thirty-nine continuation lines should issue a std-warn

[Jerry DeLisle]

:ADDPATCH fortran:

The attach patch modifies scanner.c to keep track of the number of continuation 
lines in a statement.  The F95 standard 3.3.1.4 says the number shall not exceed 
39. F2003 changes this to 255.  I have set the limit to default to 255.  If 
-pedantic is given, it is set to 39.  If the limit is exceeded an error is issued.

I chose an error rather than warn because the standard states "shall not".  If 
others feel strongly that should be a warn, I can easily change.

Regression tested.  OK for trunk?

(The attached patch includes the patch for pr19260 since it is in the same 
function.  I can commit them together.)

Regards

Jerry

2006-09-22  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR fortran/19262
	* scanner.c (gfc_scanner_init_1): Initialize continuation line count
	and set the line count limit.
	(gfc_next_char_literal): Count the number of continuation lines in the
	current statement and error if limit is exceeded.
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