[pyfr] 32/88: Fix a minor error in the PI step-size controller.

[Ghislain Vaillant]

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ghisvail-guest pushed a commit to branch master
in repository pyfr.

commit 5fb4e92d5050eeb10b4f6d3df8b60916fffc9525
Author: Freddie Witherden <freddie at witherden.org>
Date:   Mon May 2 20:39:08 2016 -0700

    Fix a minor error in the PI step-size controller.
---
 pyfr/integrators/std/controllers.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyfr/integrators/std/controllers.py b/pyfr/integrators/std/controllers.py
index 45370ff..48b96d1 100644
--- a/pyfr/integrators/std/controllers.py
+++ b/pyfr/integrators/std/controllers.py
@@ -97,7 +97,7 @@ class StdPIController(BaseStdController):
         self._beta = self.cfg.getfloat(sect, 'pi-beta', 0.4)
 
         # Estimate of previous error
-        self._errprev = 0.0
+        self._errprev = 1.0
 
         # Step size adjustment factors
         self._saffac = self.cfg.getfloat(sect, 'safety-fact', 0.8)

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