Set hitCount to 0 when input changes

This line was removed in a (foolish) commit
to development. It should remain in place,
otherwise the displayed hit count is messed
up when the search input changes.

src/main/webapp/app/search/search.component.ts

@@ -30,6 +30,7 @@ export class SearchComponent implements OnInit {
     searchInput.page = 0;
     this.searchInput = searchInput;
     this.results = [];
+    this.hitCount = 0;
     this.search();
   }