use INFINITY instead of (inputValue + 1)

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

@@ -41,7 +41,7 @@ void RoundImpl_cpu_forward_kernel(
             output[i] = static_cast<O>(std::round(inputValue));
         }
         else if (mode == Round_Op::HalfwayRounding::NextInteger) {
-            output[i] = static_cast<O>(std::round(std::nextafter(inputValue, inputValue + 1)));
+            output[i] = static_cast<O>(std::round(std::nextafter(inputValue, +INFINITY)));
         }
     }
 }