[lpa-stream] operator++ should stop at end of job queue

...before moving to first item of next job queue queue, which requires
one additional call to operator++

scheduler/OStoreDB/QueueItor.hpp

@@ -37,14 +37,13 @@ public:
    /*!
     * Increment iterator
     *
-    * If we try to increment an empty queue or increment past the end of a queue, move to the first
-    * item of the next queue.
+    * Increments to the end of the current job queue. Incrementing again moves to the next queue,
+    * except when we are limited to one tapepool/vid.
     */
    void operator++() {
       if(m_jobQueueIt != m_jobQueue.end()) {
          ++m_jobQueueIt;
-      }
-      if(m_jobQueueIt == m_jobQueue.end() && !m_onlyThisQueueId) {
+      } else if(!m_onlyThisQueueId) {
          ++m_jobQueuesQueueIt;
          if(m_jobQueuesQueueIt != m_jobQueuesQueue.end()) {
             getQueueJobs();

xroot_plugins/XrdCtaListPendingQueue.hpp

@@ -101,7 +101,7 @@ public:
          } else {
             // Summary by tapepool or vid
 
-            for(bool is_buffer_full = false; !(is_buffer_full || m_queueItor.end()); )
+            for(bool is_buffer_full = false; !m_queueItor.end() && !is_buffer_full; ++m_queueItor)
             {
                uint64_t total_files = 0;
                uint64_t total_size = 0;