Initialze the rist_logging_settings as NULL per the new API changes.

tools/rist2rist.c

@@ -44,7 +44,7 @@ struct rist_cb_arg {
 };
 
 static int keep_running = 1;
-static struct rist_logging_settings *logging_settings;
+static struct rist_logging_settings *logging_settings = NULL;
 
 static struct option long_options[] = {
 { "inurl",           required_argument, NULL, 'i' },

tools/ristreceiver.c

@@ -41,7 +41,7 @@
 #define DATA_READ_MODE_API 2
 
 static int signalReceived = 0;
-static struct rist_logging_settings *logging_settings;
+static struct rist_logging_settings *logging_settings = NULL;
 enum rist_profile profile = RIST_PROFILE_MAIN;
 static int peer_connected_count = 0;
 

tools/ristsender.c

@@ -40,7 +40,7 @@
 
 static int signalReceived = 0;
 static int peer_connected_count = 0;
-static struct rist_logging_settings *logging_settings;
+static struct rist_logging_settings *logging_settings = NULL;
 
 struct rist_callback_object {
 	int sd;