Disable the CSMGradC op and opt that add it as it is broken with unsorted indices.

theano/sparse/opt.py

@@ -876,7 +876,8 @@ def local_csm_grad_c(node):
     if node.op == csm_grad(None):
         return [csm_grad_c(*node.inputs)]
     return False
-register_specialize(local_csm_grad_c, 'cxx_only')
+#DISABLED AS IT IS BROKEN FOR UNSORTED INDICES!
+#register_specialize(local_csm_grad_c, 'cxx_only')
 
 
 class MulSDCSC(gof.Op):

theano/sparse/tests/test_opt.py

@@ -37,6 +37,7 @@ def test_local_csm_properties_csm():
 
 
 def test_local_csm_grad_c():
+    raise SkipTest("Opt disabled as it don't support unsorted indices")
     if not theano.config.cxx:
         raise SkipTest("G++ not available, so we need to skip this test.")
     data = tensor.vector()