[Fix] Not enough samples in dataset when using mock_db option

examples/export_ResNet18/resnet18.py

@@ -196,7 +196,7 @@ backend = "cuda" if USE_CUDA else "cpu"
 aidge_tensors = []
 labels  = []
 if args.mock_db:
-    for i in range(NB_TEST):
+    for i in range(max(NB_TEST, NB_CALIB)):
         aidge_tensor = aidge_core.Tensor(dims=(1, 3, 224, 224))
         aidge_tensor.set_backend(backend)
         aidge_tensor.set_datatype(aidge_core.dtype.float32)