Fixed Clip gradient on edge cases

include/aidge/backend/cpu/operator/ClipImpl_kernels.hpp

@@ -46,9 +46,11 @@ void ClipImpl_cpu_backward_kernel(
     const I* input = static_cast<const I*>(input_);
     const GO* grad_output = static_cast<const GO*>(grad_output_);
     GI* grad_input = static_cast<GI*>(grad_input_);
+    I minCasted = static_cast<I>(min_);
+    I maxCasted = static_cast<I>(max_);
 
     for (std::size_t i = 0; i < length; ++i) {
-        grad_input[i] += ((input[i] > min_) && (input[i] < max_)) ? grad_output[i] : 0;
+        grad_input[i] += ((input[i] >= minCasted) && (input[i] <= maxCasted)) ? grad_output[i] : 0;
     }
 }