fix(ElemPerf): bug in Reynolds calculation

fix(ElemPerf): fix wrong writting of properties

See merge request rotare/rotare!5

src/classes/@ElemPerf/ElemPerf.m

@@ -164,7 +164,8 @@ classdef ElemPerf < handle
             % neglecting induced velocities.
             if isempty(self.reynolds_)
                 relVel = sqrt(self.tgSpeed.^2 + self.upstreamVelAx.^2);
-                reynolds = Flow.reynolds(relVel, Rot.Bl.chord, Op.Flow.mu, Op.Flow.rho);
+                reynolds = Flow.reynolds(relVel, self.Rot.Bl.chord, ...
+                                         self.Op.Flow.mu, self.Op.Flow.rho);
             else
                 reynolds = self.reynolds_;
             end