When generating Dewey sortables, don't skip invalid values.

- Resolves VUFIND-1021.

import/index_scripts/dewey.bsh

@@ -136,6 +136,11 @@ public List getDeweySortables(Record record, String fieldSpec) {
         // If this is a valid Dewey number, return the sortable shelf key:
         if (CallNumUtils.isValidDewey(current)) {
             result.add(CallNumUtils.getDeweyShelfKey(current));
+        } else {
+            // If the number is invalid, we can't normalize it, but we still want
+            // to put an entry in the sort list so that things don't get out of sync
+            // for the AlphaBrowse indexer -- we'll just use the raw string
+            result.add(current);
         }
     }