Bug#311438: Patch to fix the problem.

[Peter Chubb <peterc@gelato.unsw.edu.au>]

The problem is an off-by-one when working out the position of the
first digit after the slash in -S/xxx

Here's a patch:

--- xc-orig/programs/xterm/main.c	2005-06-01 15:19:07.065945065 +1000
+++ xc/programs/xterm/main.c	2005-06-01 15:17:53.964033669 +1000
@@ -1430,7 +1430,7 @@
     Bool code = False;
 
     if (leaf != option) {
-	if (leaf - option > 1
+	if (leaf - option > 0
 	    && isdigit(CharOf(*leaf))
 	    && sscanf(leaf, "%d", &am_slave) == 1) {
 	    size_t len = leaf - option - 1;