new: [vps-install backup] add a warning about vps unexpected failure upon identifying vps type

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

bin/0km

@@ -644,9 +644,11 @@ vps_backup_recover() {
         return 1
     }
 
-    type=$(ssh:run "root@$vps" -- vps get-type) && {
+    if type=$(ssh:run "root@$vps" -- vps get-type); then
         info "VPS $vps seems to be of ${WHITE}$type${NORMAL} type"
-    }
+    else
+        warn "Couldn't find type of vps '$vps' (command 'vps get-type' failed on vps)."
+    fi
 
     if [ -z "$path" ]; then
         if [ -n "$vps_path" ]; then