Switch to always using zero compression in N42-2012 files, for consis…

…tencies sake.

src/SpecFile_n42.cpp

@@ -1135,10 +1135,13 @@ void add_spectra_to_measurement_node_in_2012_N42_xml( ::rapidxml::xml_node<char>
 
  const string detnam = !m->detector_name().empty() ? m->detector_name() : s_unnamed_det_placeholder;
 
- //Below choice of zero compressing if the gamma sum is less than 15 times the
- // number of gamma channels is arbitrarily chosen, and has not been
- // benchmarked or checked it is a reasonable value
- const bool zerocompressed = (!!m->gamma_counts() && (m->gamma_count_sum()<15.0*m->gamma_counts()->size()));
+ // Zero compression can increase the length of the XML if there are a lot of zero channels
+ // right next to non-zero channels. We could use a simple heuristic, like is commented
+ // out below, to try to pick the shorter option, but for now we'll just be consistent and
+ // always use it.
+ //const bool zerocompressed = (!!m->gamma_counts() && (m->gamma_count_sum()<15.0*m->gamma_counts()->size()));
+ const bool zerocompressed = true;
+
  vector<float> compressedchannels;
 
  if( zerocompressed )