--- os/connection.c.orig	Wed Nov 26 14:49:09 2003
+++ os/connection.c	Mon Mar  1 20:05:58 2004
@@ -168,12 +168,16 @@
     char **displayP;
 {
     static char newDisplay[16];
-    sprintf (newDisplay, "%d", atoi (*displayP) + 1);
-    *displayP = newDisplay;
+    long displayNum;
 
-    if (atoi (*displayP) > 65535)
+    errno = 0;
+    displayNum = strtol (*displayP, NULL, 10);
+    if ((displayNum >= 65535) || (displayNum < 0) || (errno != 0))
 	return (FALSE);
 
+    sprintf (newDisplay, "%d", displayNum + 1);
+    *displayP = newDisplay;
+
     return (TRUE);
 }