use function snapshot_fits to check if file is full. Accomodates other file storage types

Author: AaronDonahue

components/eamxx/src/share/io/scream_io_file_specs.hpp

@@ -86,10 +86,6 @@ struct IOFileSpecs {
   // If positive, flush the output file every these many snapshots
   int flush_frequency = std::numeric_limits<int>::max();
 
-  bool file_is_full () const { 
-    return storage.num_snapshots_in_file>=storage.max_snapshots_in_file; 
-  }
-
   bool file_needs_flush () const {
     return storage.num_snapshots_in_file%flush_frequency==0;
   }

components/eamxx/src/share/io/scream_output_manager.cpp

@@ -552,7 +552,8 @@ void OutputManager::run(const util::TimeStamp& timestamp)
       }
 
       // Check if we have hit the max number of snapshots and need to close the file
-      if (filespecs.file_is_full()) {
+      bool file_is_full = not filespecs.storage.snapshot_fits(m_output_control.next_write_ts);
+      if (file_is_full) {
         release_file (filespecs.filename);
         filespecs.close();
       }