ignore broadcaster cells to fill autofilter dialog, fdo#55712

Change-Id: Iacd3f8cfc26bb147eaf3b6957338be212b448226

sc/source/core/data/column3.cxx

@@ -1499,6 +1499,10 @@ void ScColumn::GetFilterEntries(SCROW nStartRow, SCROW nEndRow, std::vector<ScTy
             }
             break;
 
+            // skip broadcaster cells
+            case CELLTYPE_NOTE:
+                continue;
+
             default:
                 ;
         }