Address comments.

theano/sandbox/gpuarray/elemwise.py

@@ -221,6 +221,7 @@ class GpuElemwise(HideC, Elemwise):
         # check that all inputs have valid dimensions
         emitted_inames = {}
         code = """
+        // +1 is so that MSVC is happy when nd == 0
         size_t dims[%(nd)s+1] = {%(initial_dims)s};
         void *rargs[%(nargs)s] = {0};
         """ % locals()