fix error in allclose call

Author: aestrivex

surfer/viz.py

@@ -2169,7 +2169,7 @@ def save_movie(self, fname, time_dilation=4., tmin=None, tmax=None,
 
         # find indexes at which to create frames
         tstep = 1. / (framerate * time_dilation)
-        if np.allclose(((tmax - tmin) % tstep, 0)):
+        if np.allclose((tmax - tmin) % tstep, 0):
             tstop = tmax + tstep / 2.
         else:
             tstop = tmax