ce16e55 Avoid crash if a module is not available on all arches

Authored and Committed by lsedlar 4 years ago
    Avoid crash if a module is not available on all arches
    
    Theoretically it is possible, and this is the bare minimum of changes
    needed to survive such situation. There may be other pitfalls.
    
    Fixes: https://pagure.io/pungi/issue/1309
    JIRA: COMPOSE-4016
    Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>
    
        
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