AP_Arming: default to arming required

libraries/AP_Arming/AP_Arming.cpp

@@ -25,7 +25,7 @@ const AP_Param::GroupInfo AP_Arming::var_info[] PROGMEM = {
     // @Description: Arming disabled until some requirements are met. If 0, there are no requirements (arm immediately).  If 1, require rudder stick or GCS arming before arming motors and send THR_MIN PWM to throttle channel when disarmed.  If 2, require rudder stick or GCS arming and send 0 PWM to throttle channel when disarmed. See the ARMING_CHECK_* parameters to see what checks are done before arming. Note, if setting this parameter to 0 a reboot is required to arm the plane.  Also note, even with this parameter at 0, if ARMING_CHECK parameter is not also zero the plane may fail to arm throttle at boot due to a pre-arm check failure.
     // @Values: 0:Disabled,1:THR_MIN PWM when disarmed,2:0 PWM when disarmed
     // @User: Advanced
-    AP_GROUPINFO("REQUIRE",     0,      AP_Arming,  require,                 0),
+    AP_GROUPINFO("REQUIRE",     0,      AP_Arming,  require,                 1),
 
     // @Param: DIS_RUD
     // @DisplayName: Disable Rudder Arming