gdb/gdbserver/

gdb/gdbserver/
	* tracepoint.c (cur_action, cur_step_action): Make them unsigned.
	(cmd_qtfp): Initialize cur_action and cur_step_action 0 instead
	of -1.
	(cmd_qtsp): Adjust condition.  Do post increment.
	Set cur_action and cur_step_action back to 0.