When determining the fluxes to compute, make sure we only try to access the...

When determining the fluxes to compute, make sure we only try to access the list of bands to analyse when that parameter is actually present in the analysis module.

pcigale/managers/models.py

@@ -37,10 +37,13 @@ class ModelsManager(object):
                              self.allintpropnames & props_nolog)
         self.extpropnames = (self.allextpropnames & set(obs.extprops) |
                              self.allextpropnames & props_nolog)
+        if 'bands' in conf['analysis_params']:
+            bandnames = set(obs.bands+conf['analysis_params']['bands'])
+        else:
+            bandnames = obs.bands
         size = len(params.blocks[iblock])
 
-        self.flux = {band: SharedArray(size)
-                     for band in set(obs.bands+conf['analysis_params']['bands'])}
+        self.flux = {band: SharedArray(size) for band in bandnames}
         self.intprop = {prop: SharedArray(size) for prop in self.intpropnames}
         self.extprop = {prop: SharedArray(size) for prop in self.extpropnames}