protected against dereferencing rogue pointers

logging.c

@@ -148,6 +148,7 @@ void log_error(code)
      * XXX - don't use 33, use a macro!
      */
     count = 33 + 128 + 2 * MAXPATHLEN + strlen(tty) + strlen(cwd);
+    if (NewArgc > 1)
 	for (a = &NewArgv[1]; *a; a++)
 	    count += strlen(*a) + 1;
 
@@ -288,6 +289,7 @@ void log_error(code)
 	/* XXX - this could be sped up */
 	strcat(logline, cmnd);
 	strcat(logline, " ");
+	if (NewArgc > 1)
 	    for (a = &NewArgv[1]; *a; a++) {
 		strcat(logline, *a);
 		strcat(logline, " ");
@@ -550,6 +552,7 @@ void inform_user(code)
 		"Sorry, user %s is not allowed to execute \"%s",
 		user_name, cmnd);
 
+	    if (NewArgc > 1)
 		for (a = &NewArgv[1]; *a; a++) {
 		    fputc(' ', stderr);
 		    fputs(*a, stderr);