Fix zfs_sysfs_live test failure
The ZTS zfs_sysfs_live test fails occasionally due to an uninitialized string on an error path. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Don Brady <don.brady@delphix.com> Closes #7869
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@ -294,9 +294,11 @@ zprop_sysfs_show(const char *attr_name, const zprop_desc_t *property,
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property->pd_strdefault : "";
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break;
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case PROP_TYPE_INDEX:
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(void) zprop_index_to_string(property->pd_propnum,
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if (zprop_index_to_string(property->pd_propnum,
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property->pd_numdefault, &show_str,
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property->pd_types);
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property->pd_types) != 0) {
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show_str = "";
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}
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break;
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default:
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return (0);
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