Fix fast softmax

src/targets/gpu/kernels/include/migraphx/kernels/softmax.hpp

@@ -35,7 +35,7 @@ __device__ void softmax(Input input1, Output output)
     reduce::block::run<reduce::with_axis<Input, Axis>>([&](auto, auto r) {
         auto input = r.inner(op::id{})(input1);
 #ifdef MIGRAPHX_USE_FAST_SOFTMAX
-        const auto c = vec_at(r.slice(input)[0], 0);
+        const auto c = vec_at(r.slice(input1)[0], 0);
 #else
         const auto c = r.reduce(op::max{}, lowest{}, op::id{})(input);
 #endif