"disable_script" function breaks "grub-mkconfig"

* "disable_script" function breaks "grub-mkconfig":
  * Replace "return 1" by "exit 0".

41_snapshots-btrfs

@@ -45,15 +45,12 @@ grub_btrfs_config="${sysconfdir}/default/grub-btrfs/config"
 
 ## Exit the script, if:
 disable_script() {
-    # Disable Grub-btrfs is set to true (default=false)
-    [[ "${GRUB_BTRFS_DISABLE:-"false"}" == "true" ]] && return 1
-    # btrfs-progs isn't installed
-    if ! type btrfs >/dev/null 2>&1; then return 1; fi
-    # grub-mkconfig_lib couldn't be found
-    [[ -f "$datarootdir/grub/grub-mkconfig_lib" ]] && . "$datarootdir/grub/grub-mkconfig_lib" || return 1
+    [[ "${GRUB_BTRFS_DISABLE:-"false"}" == "true" ]] && exit 0 # Disable Grub-btrfs is set to true (default=false)
+    if ! type btrfs >/dev/null 2>&1; then exit 0; fi # btrfs-progs isn't installed
+    [[ -f "$datarootdir/grub/grub-mkconfig_lib" ]] && . "$datarootdir/grub/grub-mkconfig_lib" || exit 0 # grub-mkconfig_lib couldn't be found
     # Root filesystem isn't btrfs
     root_fs=$(${grub_probe} --target="fs" / 2>/dev/null)
-    [[ "$root_fs" != "btrfs" ]] && return 1
+    [[ "$root_fs" != "btrfs" ]] && exit 0
     return 0
 }
 disable_script