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='2023-07-19 15:53:28 +0200'>2023-07-19</span></td><td><a href='/guix/commit/tests/import-utils.scm?id=b9bd1bcce995299065252e192c96ae302c9b0e81'>import/utils: beautify-description: Wrap class names in @code{...}.</a><span class='msg-avail'>...</span></td><td>Ricardo Wurmus</td></tr>
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<tr><td><span title='2022-11-18 15:44:38 +0100'>2022-11-18</span></td><td><a href='/guix/commit/tests/import-utils.scm?id=fd5e642513ea08cc9ba3b4197bcbf0b8d37ae966'>import/utils: spdx-string-&gt;license: Support '+' operator.</a><span class='msg-avail'>...</span></td><td>Philip McGrath</td></tr>
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<tr><td><span title='2021-09-01 23:41:42 +0200'>2021-09-01</span></td><td><a href='/guix/commit/tests/import-utils.scm?id=f95bdeb93a30b89c821627aa91da4ef3afaeb5af'>import: utils: Skip not found packages.</a><span class='msg-avail'>...</span></td><td>Sarah Morgensen</td></tr>