Fixes a fatal constness error with g++ 4.8.2.
--- aegis-4.24/common/ac/string/memmem.cc	2008-03-14 07:19:27.000000000 +0100
+++ aegis-4.24/common/ac/string/memmem.cc	2014-01-26 11:17:58.000000000 +0100
@@ -182,7 +182,7 @@
 
     // Use optimizations in memchr when possible.
     if (needle_len == 1)
-        return memchr(haystack, *needle, haystack_len);
+        return (void *) memchr(haystack, *needle, haystack_len);
 
     // Minimizing the worst-case complexity:
     // Let n = haystack_len, m = needle_len.
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<tr><td><span title='2024-08-25 09:06:31 -0500'>2024-08-25</span></td><td><a href='/guix/commit/gnu/packages/pantheon.scm?id=c62b729b3ec61958b0a883d82ef45a4a45733690'>gnu: pantheon-terminal: Use gexp modern style.</a><span class='msg-avail'>...</span></td><td>jgart</td></tr>
<tr><td><span title='2024-08-22 12:23:00 -0500'>2024-08-22</span></td><td><a href='/guix/commit/gnu/packages/pantheon.scm?id=d89d4d7077e4220eda3398931ce45723ce926c39'>gnu: Add pantheon-photos.</a><span class='msg-avail'>...</span></td><td>altadil</td></tr>
<tr><td><span title='2024-06-11 11:59:40 +0100'>2024-06-11</span></td><td><a href='/guix/commit/gnu/packages/pantheon.scm?id=382be5720c972aa3b54f4b7c00bc21f249855723'>gnu: pantheon-calculator: Update to 8.0.0.</a><span class='msg-avail'>...</span></td><td>altadil</td></tr>