Merge tag 'v5.52' into develop

hotfix

rowers/interactiveplots.py

@@ -1482,13 +1482,14 @@ def interactive_cpchart(rower,thedistances,thesecs,theavpower,
     
     # fitting the data to three parameter CP model
     
-
+    success = 0
     p1 = p0
     if len(thesecs)>=4:
 	p1, success = optimize.leastsq(errfunc, p0[:], args = (thesecs,theavpower))
     else:
 	factor = fitfunc(p0,thesecs.mean())/theavpower.mean()
 	p1 = [p0[0]/factor,p0[1]/factor,p0[2],p0[3]]
+        success = 0
 
 
     # Get stayer score