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update doc for rmw_get_node_names to mention potential null values (#214)

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Dirk Thomas 2018-03-30 10:56:42 -07:00 • committed by GitHub
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rcl/include/rcl/graph.h
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@ -166,6 +166,7 @@ rcl_names_and_types_fini(rcl_names_and_types_t * names_and_types);
* The node_names parameter must be allocated and zero initialized.
* The node_names is the output for this function, and contains
* allocated memory.
* Note that entries in the array might contain `NULL` value.
* Use rcutils_get_zero_initialized_string_array() for initializing an empty
* rcutils_string_array_t struct.
* This node_names struct should therefore be passed to rcutils_string_array_fini()