gst-inspect: only print presets line if num-presets > 0
Also check for an empty strv.
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@ -891,7 +891,7 @@ print_preset_list (GstElement * element)
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return;
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presets = gst_preset_get_preset_names (GST_PRESET (element));
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if (presets) {
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if (presets && *presets) {
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n_print ("\n");
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n_print ("Presets:\n");
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for (preset = presets; *preset; preset++) {
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