Bug fix for generator MatchRFBucket6D and derivations.

Accordingly put version to v1.0.6.

Problem: on certain 32bit python environments,
sys.maxint as a seed is not allowed and leads to crashes.

Quick fix: use maximum int32 value.

Suggestion: use current time allowing for easier reproducibility.

Author: aoeftiger

_version.py

@@ -1,2 +1,2 @@
-__version__ = "1.0.5"
+__version__ = "1.0.6"
 

particles/generators.py

@@ -551,7 +551,7 @@ def __init__(self, psi, rfbucket, sigma_z=None, epsn_z=None):
         else:
             raise ValueError("Can not generate mismatched matched distribution!")
 
-        self.seed = np.random.randint(sys.maxint)
+        self.seed = np.random.randint(np.iinfo(np.int32).max)
 
     def psi_for_emittance_newton_method(self, epsn_z):
         H = self.H