Re: [PATCH 5/6] misc: fix gcc-7 snprintf warnings -Wformat-truncation

["Rüdiger Meier" <sweet_f_a@gmx.de>]

BTW there is another of these warnings left, see below. I'm not sure here what
to do. Note, it's pssible to silent this warning also by _using_ snprintf's
return value.

../libblkid/src/partitions/partitions.c:1371:45: warning: '%02x' directive output may be truncated writing between 2 and 8 bytes into a region of size between 0 and 36 [-Wformat-truncation=]
   snprintf(par->uuid, sizeof(par->uuid), "%s-%02x",
                                              ^~~~
../libblkid/src/partitions/partitions.c:1371:41: note: using the range [0, 4294967295] for directive argument
   snprintf(par->uuid, sizeof(par->uuid), "%s-%02x",
                                          ^~~~~~~~~
../libblkid/src/partitions/partitions.c:1371:2: note: 'snprintf' output between 4 and 46 bytes into a destination of size 37
   snprintf(par->uuid, sizeof(par->uuid), "%s-%02x",
   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     par->tab->id, par->partno);
     ~~~~~~~~~~~~~~~~~~~~~~~~~~