Only write FSRs if we have an output file

Phys/DaVinci/python/DaVinci/config.py

@@ -177,7 +177,7 @@ def add_davinci_configurables(options, user_algorithms, public_tools):
     dvMainFlow = apply_filters(options, user_algorithms)
 
     fsrAlgs = {}
-    if options.write_fsr:
+    if options.write_fsr and options.output_file:
         if options.simulation:
             fsrAlgs.update({"GenFSR": define_fsr_writer(options)})