clang-tidy modernize-use-nullptr

src/modules/navigator/geofence.cpp

@@ -332,14 +332,14 @@ Geofence::loadFromFile(const char *filename)
 	/* open the mixer definition file */
 	fp = fopen(GEOFENCE_FILENAME, "r");
 
-	if (fp == NULL) {
+	if (fp == nullptr) {
 		return PX4_ERROR;
 	}
 
 	/* create geofence points from valid lines and store in DM */
 	for (;;) {
 		/* get a line, bail on error/EOF */
-		if (fgets(line, sizeof(line), fp) == NULL) {
+		if (fgets(line, sizeof(line), fp) == nullptr) {
 			break;
 		}
 

src/modules/navigator/navigator_main.cpp

@@ -100,7 +100,7 @@ Navigator	*g_navigator;
 }
 
 Navigator::Navigator() :
-	SuperBlock(NULL, "NAV"),
+	SuperBlock(nullptr, "NAV"),
 	_task_should_exit(false),
 	_navigator_task(-1),
 	_mavlink_log_pub(nullptr),