Get rid of a single-user macro: RETURN_STRING()

Signed-off-by: David Sommerseth <davids@redhat.com>

Author: David Sommerseth

python-ethtool/etherinfo_obj.c

@@ -145,7 +145,11 @@ PyObject *_ethtool_etherinfo_getter(etherinfo_py *self, PyObject *attr_o)
 	}
 
 	if( strcmp(attr, "device") == 0 ) {
-		return RETURN_STRING(self->data->ethinfo->device);
+                if( self->data->ethinfo->device ) {
+                        return PyString_FromString(self->data->ethinfo->device);
+                } else {
+                        return Py_INCREF(Py_None), Py_None;
+                }
 	} else if( strcmp(attr, "mac_address") == 0 ) {
 		get_etherinfo(self->data, NLQRY_LINK);
                 Py_INCREF(self->data->ethinfo->hwaddress);

python-ethtool/etherinfo_struct.h

@@ -72,14 +72,6 @@ typedef struct {
 } etherinfo_py;
 
 
-/**
- * NULL safe PyString_FromString() wrapper.  If input string is NULL, None will be returned
- *
- * @param str Input C string (char *)
- *
- * @return Returns a PyObject with either the input string wrapped up, or a Python None value.
- */
-#define RETURN_STRING(str) (str ? PyString_FromString(str) : (Py_INCREF(Py_None), Py_None))
 
 PyObject * make_python_address_from_rtnl_addr(struct rtnl_addr *addr);