Description of problem:
cmsfs-fuse fails to mount a CMS disk when the --ascii option is used and the glibc-gconv-extra package is not installed:

[root@rtt6 ~]# rpm -q glibc-gconv-extra
package glibc-gconv-extra is not installed
[root@rtt6 ~]# cmsfs-fuse --ascii /dev/disk/by-path/ccw-0.0.0191 /mnt/cms/
cmsfs-fuse: Could not initialize conversion table CP1047->ISO-8859-1.
[root@rtt6 ~]# echo $?
1
[root@rtt6 ~]# yum install glibc-gconv-extra
.
.
.
[root@rtt6 ~]# cmsfs-fuse --ascii /dev/disk/by-path/ccw-0.0.0191 /mnt/cms/
[root@rtt6 ~]# echo $?
0
[root@rtt6 ~]#


Version-Release number of selected component (if applicable):
s390utils-cmsfs-fuse-2.18.0-2.fc36.s390x

How reproducible:
always

Steps to Reproduce:
1. see above

Actual results:
Failed to mount the disk.

Expected results:
s390utils-cmsfs-fuse requires glibc-gconv-extra if it needs it.
The disk is mounted successfully.