Don't use uninitialized variable in errormsg()

Caught by Coverity.

src/sbbs3/qwk.cpp

 /* Synchronet QWK packet-related functions */
 
-/* $Id: qwk.cpp,v 1.97 2020/08/10 00:43:42 rswindell Exp $ */
-
 /****************************************************************************
  * @format.tab-size 4		(Plain Text/Source Code File Header)			*
  * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
@@ -15,21 +13,9 @@
  * See the GNU General Public License for more details: gpl.txt or			*
  * http://www.fsf.org/copyleft/gpl.html										*
  *																			*
- * Anonymous FTP access to the most recent released source is available at	*
- * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net	*
- *																			*
- * Anonymous CVS access to the development source and modification history	*
- * is available at cvs.synchro.net:/cvsroot/sbbs, example:					*
- * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs login			*
- *     (just hit return, no password is necessary)							*
- * cvs -d :pserver:anonymous@cvs.synchro.net:/cvsroot/sbbs checkout src		*
- *																			*
  * For Synchronet coding style and modification guidelines, see				*
  * http://www.synchro.net/source.html										*
  *																			*
- * You are encouraged to submit any modifications (preferably in Unix diff	*
- * format) via e-mail to mods@synchro.net									*
- *																			*
  * Note: If this box doesn't appear square, then you need to fix your tabs.	*
  ****************************************************************************/
 
@@ -234,7 +220,7 @@ void sbbs_t::update_qwkroute(char *via)
 					continue;
 				if(i==total_qwknodes) {
 					if((qwknode=(struct qwknode*)realloc(qwknode,sizeof(struct qwknode)*(i+1)))==NULL) {
-						errormsg(WHERE,ERR_ALLOC,str,sizeof(struct qwknode)*(i+1));
+						errormsg(WHERE,ERR_ALLOC,via,sizeof(struct qwknode)*(i+1));
 						break;
 					}
 					total_qwknodes++;