Avoid signed overflow during mult-s16-test which intermittently
failed.

Patch by Mark H Weaver <mhw@netris.org>.

--- pulseaudio-5.0/src/tests/mult-s16-test.c.orig	2014-01-23 13:57:55.000000000 -0500
+++ pulseaudio-5.0/src/tests/mult-s16-test.c	2014-10-24 03:13:46.464661815 -0400
@@ -55,7 +55,7 @@
 START_TEST (mult_s16_test) {
     int16_t samples[SAMPLES];
     int32_t volumes[SAMPLES];
-    int32_t sum1 = 0, sum2 = 0;
+    uint32_t sum1 = 0, sum2 = 0;
     int i;
 
     pa_random(samples, sizeof(samples));
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<tr><td><span title='2019-06-27 23:33:48 +0200'>2019-06-27</span></td><td><a href='/guix/commit/tests/grafts.scm?id=5cc1075a76392666d3d733837f5c6252b1e48002'>Merge branch 'master' into core-updates</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-06-27 11:14:41 +0200'>2019-06-27</span></td><td><a href='/guix/commit/tests/grafts.scm?id=c89985d91d2b44704fbcaebd7a097dee0c0e3e4a'>derivations: Add 'derivation-input'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-06-14 21:57:39 +0200'>2019-06-14</span></td><td><a href='/guix/commit/tests/grafts.scm?id=1ba0b1e6ec41afd94a3c5f907b1122204dcb5d9d'>packages: Remove 'search-bootstrap-binary'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-11-28 10:39:58 +0100'>2018-11-28</span></td><td><a href='/guix/commit/tests/grafts.scm?id=64fd1c01bc6f1be6ffcafc08789d5dafb9850c2e'>grafts: Record metadata as derivation properties.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-08-24 23:55:51 +0200'>2017-08-24</span></td><td><a href='/guix/commit/tests/grafts.scm?id=94e86a6b67c7a02f5f11358743f3b9f11997059c'>graft: Correctly replace references near the end of the scan buffer.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-01-25 11:04:25 +0100'>2017-01-25</span></td><td><a href='/guix/commit/tests/grafts.scm?id=482fda2729c3e76999892cb8f9a0391a7bd37119'>grafts: Do not pull derivation outputs not depended on.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-10-17 23:59:03 +0200'>2016-10-17</span></td><td><a href='/guix/commit/tests/grafts.scm?id=3d47aa81ba4c19b45ce9a9ff0ece0252777ea8ed'>grafts: Apply the right grafts in the presence of multiple outputs.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-10-14 23:31:50 +0200'>2016-10-14</span></td><td><a href='/guix/commit/tests/grafts.scm?id=b013c33f6f060c14ca7d1f3cfcb5d8ce3ef1c53c'>grafts: 'graft-derivation' does now introduce grafts that shadow other grafts.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-10-03 23:16:48 +0200'>2016-10-03</span></td><td><a href='/guix/commit/tests/grafts.scm?id=57bdd79e485801ccf405ca7389bd099809fe5d67'>grafts: Allow the replacement to have a different name.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-07-12 22:47:08 +0200'>2016-07-12</span></td><td><a href='/guix/commit/tests/grafts.scm?id=66a35ceb43f53c3f3e363714c9a6a402f243670d'>gexp: Remove more uses of #:modules.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>