GPS driver: Add more stack to suit data definition increases

src/drivers/gps/gps.cpp

@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   Copyright (c) 2013-2016 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2013-2017 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -321,7 +321,7 @@ int GPS::init()
 
 	/* start the GPS driver worker task */
 	_task = px4_task_spawn_cmd("gps", SCHED_DEFAULT,
-				   SCHED_PRIORITY_SLOW_DRIVER, 1500, (px4_main_t)&GPS::task_main_trampoline, args);
+				   SCHED_PRIORITY_SLOW_DRIVER, 1550, (px4_main_t)&GPS::task_main_trampoline, args);
 
 	if (_task < 0) {
 		PX4_WARN("task start failed: %d", errno);