TST avoid numpy deprecation warning in tests under Python 3

theano/tensor/tests/test_sharedvar.py

@@ -316,7 +316,7 @@ def makeSharedTester(shared_constructor_,
             if dtype is None:
                 dtype = theano.config.floatX
 
-            shp = (100/4, 1024)  # 100KB
+            shp = (100//4, 1024)  # 100KB
 
             x = numpy.zeros(shp, dtype=dtype)
             x = self.cast_value(x)