[tex4ht] xetex id update for tex4ht binary

[Karl Berry]

About the xetex failure with tex4ht.  I built a tex4ht binary with the
following trivial change to allow for the new xetex id byte (7, as you
can see by running dvitype on the .xdv file), as well as older/smaller
id bytes, and it seemed to work in a trivial test.

i386-linux binary attached (hopefully it runs on 64-bit too, but I don't
know).  Before I ask the other TL builders to remake with this change,
could anyone confirm that it works?

Thanks,
Karl

--- tex4ht.c	(revision 42098)
+++ tex4ht.c	(working copy)
@@ -6809,8 +6809,8 @@
     ||
     ((ch != 
 2 
-) && (ch != 
-5
+) && (ch >
+7
 
 ))
   )  bad_dvi;

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