fix test as now we don't limit the number of fused op on the cpu.

theano/tensor/tests/test_opt.py

@@ -629,7 +629,7 @@ class test_fusion(unittest.TestCase):
             (fw+fx*fy*fz,(fw,fx,fy,fz),(fwv,fxv,fyv,fzv),1,fwv+fxv*fyv*fzv,'float32'),
             (fx+fy*fz*fx,(fx,fy,fz),(fxv,fyv,fzv),1,fxv+fyv*fzv*fxv,'float32'),
             (fx*fy+fz+fy,(fx,fy,fz),(fxv,fyv,fzv),1,fxv*fyv+fzv+fyv,'float32'),#15
-            (fx*fy*fz*fw+fx+fy+fz+fw,(fw,fx,fy,fz),(fwv,fxv,fyv,fzv),2,fxv*fyv*fzv*fwv+fxv+fyv+fzv+fwv,'float32'),#expect 2 as their is limit to the fusion on the gpu.
+            (fx*fy*fz*fw+fx+fy+fz+fw,(fw,fx,fy,fz),(fwv,fxv,fyv,fzv),1,fxv*fyv*fzv*fwv+fxv+fyv+fzv+fwv,'float32'),
             #test with constant
             ((fw+fx)+(fy+fz)+2,(fw,fx,fy,fz),(fwv,fxv,fyv,fzv),1,fwv+fxv+fyv+fzv+2,'float32'),
             (((fw+fx)+2+fy)+fz,(fw,fx,fy,fz),(fwv,fxv,fyv,fzv),1,fwv+fxv+fyv+fzv+2,'float32'),