Fixing non-saved figure

The figure generated using "do_trajectory_plot" was not saved since plt.show() was placed before plt.savefig().
I change the order of them so that the generated figure automatically gets saved when you run "do_trajectory_plot".

Author: toyofumi-yamauchi

scripts/rustbca.py

@@ -132,8 +132,8 @@ def do_trajectory_plot(name, thickness=None, depth=None, boundary=None, plot_fin
         plt.ylabel('y [um]')
         plt.title(name+' Trajectories')
         plt.axis('square')
-        if show: plt.show()
         plt.savefig(name+'trajectories_.png')
+        if show: plt.show()
         plt.close()
 
 def do_trajectory_plot_3d(name, thickness=None, depth=None, boundary=None, plot_final_positions=True, plot_origins=True, radius=None, cube_length=None, input_file=None):