By default 'mutt' embeds configure flags and the output of 'gcc -v',
which contains the store file name of Bash and GCC.  This patch makes
sure we don't embed a reference to these in 'mutt'.

--- mutt-1.5.23/txt2c.sh	2015-06-26 22:56:56.500731643 +0200
+++ mutt-1.5.23/txt2c.sh	2015-06-26 22:57:26.664583900 +0200
@@ -21,6 +21,8 @@ txt2c_fallback () {
 	echo ";"
 }
 
+echo "unsigned char $1[] = \"value of '$1' not kept\";"
+exit 0
 ./txt2c test </dev/null >/dev/null 2>&1 &&
 ./txt2c "$1" ||
 txt2c_fallback "$1"

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<tr><td><span title='2020-12-17 00:15:49 +0100'>2020-12-17</span></td><td><a href='/guix/commit/gnu/packages/patches/tcsh-fix-autotest.patch?id=bca05d07099703f37eaf3a0eab9b87ea3e472279'>gnu: tcsh: Update to 6.22.03.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-12-05 17:59:10 +0100'>2019-12-05</span></td><td><a href='/guix/commit/gnu/packages/patches/tcsh-fix-autotest.patch?id=d098aa3e67b934f61758430c4740cd86d1ff234d'>gnu: tcsh: Update to 6.22.02.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2017-02-24 13:22:06 -0500'>2017-02-24</span></td><td><a href='/guix/commit/gnu/packages/patches/tcsh-fix-autotest.patch?id=816417f5a48cbdf8e551b47d36bb56be17dd4b9e'>gnu: tcsh: Update to 6.20.00.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>