Merge branch 'fix/inca-crash' into 'master'

Fix crash with InCA without accelerator

See merge request !74

pyjapc/_japc.py

@@ -136,7 +136,7 @@ class PyJapc:
 
             if ic.isConfigured():
                 accelerator = ic.getAccelerator()
-                if accelerator.getName() != incaAcceleratorName:
+                if accelerator is not None and accelerator.getName() != incaAcceleratorName:
                     self.log.warning("INCA is already configured for {0}, cannot change it to {1}.".format(
                         accelerator.getName(), incaAcceleratorName
                     ))