ggml : allow using the default ggml_type value in the name function

[ykhrustalev]

• I have read the contributing guidelines
• Self-reported review complexity:
  • Low
  • Medium
  • High

[ggerganov]

When running on Windows, the quantization utility attempts to print the types that are not set which leads to a crash.

There should be no types without a name. What command do you use to trigger this?

[ykhrustalev]

that is manually added extra logging that is added to the quantize.cpp

    fprintf(stderr, "  output_tensor_type       : %s\n", ggml_type_name(params.output_tensor_type));
    fprintf(stderr, "  token_embedding_type     : %s\n", ggml_type_name(params.token_embedding_type));
    fprintf(stderr, "  special_layer_quant_type : %s\n", ggml_type_name(params.special_layer_quant_type));

where params.output_tensor_type is a default value