[Fix] Attributes first index result in Conv

include/aidge/operator/Conv.hpp

@@ -171,8 +171,8 @@ public:
             // Result
             std::vector<std::pair<std::size_t, std::vector<DimSize_t>>> res;
             res.push_back(std::pair<std::size_t, std::vector<DimSize_t>>(mInputs[0]->getIdx(inputIdxDims), inputDims));
-            res.push_back(std::pair<std::size_t, std::vector<DimSize_t>>(weightIdxDims, weightDims));
-            res.push_back(std::pair<std::size_t, std::vector<DimSize_t>>(biasIdxDims, biasDims));
+            res.push_back(std::pair<std::size_t, std::vector<DimSize_t>>(mInputs[1]->getIdx(weightIdxDims), weightDims));
+            res.push_back(std::pair<std::size_t, std::vector<DimSize_t>>(mInputs[2]->getIdx(biasIdxDims), biasDims));
             return res;
         }
         AIDGE_THROW_OR_ABORT(std::runtime_error, "Given outputDim out of range or output dim not forwarded yet.");