Fix a bug whereby 'mformat' could end up passing uninitialized bytes
to write(2).  This could be reproduced with:

  mformat -C -f 1440 -L 16  -N 77777777 -i  /tmp/x ::

where the output of /tmp/x would be non-deterministic.

Patch by Ludovic Courtès <ludo@gnu.org>.

--- mtools-4.0.23/mformat.c	2019-04-21 00:12:01.496116195 +0200
+++ mtools-4.0.23/mformat.c	2019-04-21 00:12:36.675967157 +0200
@@ -927,6 +927,7 @@ void mformat(int argc, char **argv, int
 	
 	char *endptr;
 
+	memset(&boot.bytes, '\0', sizeof boot);
 	hs = hs_set = 0;
 	argtracks = 0;
 	argheads = 0;

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<tr><td><span title='2019-01-14 15:07:42 +0200'>2019-01-14</span></td><td><a href='/guix/commit/gnu/packages/patches/opencv-rgbd-aarch64-test-fix.patch?id=8e21fa0bd347117ae907827272f95cf4647a0af7'>gnu: opencv: Loosen test suite failures.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/image-processing.scm (opencv)[native-inputs]: Add patch
to opencv-contrib.
[arguments]: Update 'unpack-submodule-sources phase.
* gnu/packages/patches/opencv-rgbd-aarch64-test-fix.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
</span></span></td><td>Efraim Flashner</td></tr>