patron-client: fix bug affecting realia with more than one items

redef/patron-client/src/frontend/utils/libraryFilters.js

@@ -12,8 +12,8 @@ export function filterPickupLibrariesByItems (libraries, items) {
   const res = {}
   const itemBranches = []
   items.forEach(i => { itemBranches.push(i.branchcode) })
-  if (itemBranches in libraries) {
-    res[itemBranches] = libraries[itemBranches]
-  }
+  itemBranches.forEach(branch => {
+    res[branch] = libraries[branch]
+  })
   return res
 }