as.texinfo typo fix

[Alan Modra]

	* doc/as.texinfo (listing): Fix typo.

Committed.

Index: gas/doc/as.texinfo
===================================================================
RCS file: /cvs/src/src/gas/doc/as.texinfo,v
retrieving revision 1.44
diff -u -p -r1.44 as.texinfo
--- as.texinfo	2001/09/19 07:55:23	1.44
+++ as.texinfo	2001/10/02 06:20:59
@@ -1395,7 +1395,7 @@ On the HPPA local labels begin with @sam
 @end ifset
 
 @node listing
-@section Configuringh listing output: @code{--listing}
+@section Configuring listing output: @code{--listing}
 
 The listing feature of the assembler can be enabled via the command line switch
 @samp{-a} (@pxref{a}).  This feature combines the input source file(s) with a