ComputeFstat: fix whatToCompute

 -it's a bit field, so need += in atoms case

pyfstat/core.py

@@ -554,10 +554,9 @@ class ComputeFstat(BaseSearchClass):
 
         logging.info("Initialising FstatInput")
         dFreq = 0
-        if self.transientWindowType or self.computeAtoms:
-            self.whatToCompute = lalpulsar.FSTATQ_ATOMS_PER_DET
-        else:
         self.whatToCompute = lalpulsar.FSTATQ_2F
+        if self.transientWindowType or self.computeAtoms:
+            self.whatToCompute += lalpulsar.FSTATQ_ATOMS_PER_DET
 
         FstatOAs = lalpulsar.FstatOptionalArgs()
         FstatOAs.randSeed = lalpulsar.FstatOptionalArgsDefaults.randSeed