Fix no bias

FC kernel does not handle properly the absence of bias!

This closes the outdated !20 (closed).

aidge_export_cpp/kernels/fullyconnected.hpp

@@ -30,7 +30,7 @@ void fullyconnected_forward (
     // Solution: Add a system to check dataformat
     for (int och = 0; och < NB_OUTPUTS; och++) {
 
-        Bias_T weightedSum = biases[och];
+        Bias_T weightedSum = (biases) ? biases[och] : Bias_T(0);
 
         for (int iy = 0; iy < CHANNELS_HEIGHT; ++iy) {
             for (int ix = 0; ix < CHANNELS_WIDTH; ++ix) {
@@ -48,7 +48,7 @@ Here the kernel to use with inputs in NHWC and weights in NHWC
 #pragma omp parallel for
     for (int och = 0; och < NB_OUTPUTS; och++) {
 
-        Bias_T weightedSum = biases[och];
+        Bias_T weightedSum = (biases) ? biases[och] : Bias_T(0);
 
         for (int iy = 0; iy < CHANNELS_HEIGHT; ++iy) {
             const int iPos = (CHANNELS_WIDTH * iy);