Fix choosing of apps

src/freedombone-utils-selector

 function choose_apps_for_variant {
     variant_name="$1"
 
+    if [ ${#variant_name} -eq 0 ]; then
+        echo $"No variant name for choosing apps"
+        exit 237567
+    fi
+
     FILES=/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-*
 
     APPS_CHOSEN=()
         app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
 
         item_in_array "${app_name}" "${APPS_AVAILABLE[@]}"
-        if [[ $? != 0 ]]; then
-            APPS_AVAILABLE+=("${app_name}")
-
+        if [[ $? == 0 ]]; then
             if grep -q "VARIANTS=" ${filename}; then
                 variants_list=$(app_variants $filename)
                 if [[ "${variants_list}" == 'all'* || \
             else
                 APPS_CHOSEN+=("0")
             fi
-
         fi
     done