Bug fixes.

- G38.x was not printing correctly in the $G g-code state reports. Now
fixed.

- When investigating the above issue, it was noticed that G38.x
wouldn’t show at all, but instead a G0 would be printed. This was
unlike the v0.9j master build. It turned out volatile variables do not
like to be defined inside a C struct. These are undefined on how to be
handled. Once pulled out, all weird issues went away.

- Also changed two ‘sizeof()’ statements in the mc_probe() and
probe_state_monitor() functions to be more robust later on.

- Updated the commit logs to individual files for each minor release.
Forgot to update the generating script to account for this.

grbl/system.h

@@ -85,19 +85,19 @@ typedef struct {
   uint8_t suspend;               // System suspend bitflag variable that manages holds, cancels, and safety door.
   uint8_t step_control;
 
-  volatile uint8_t rt_exec_state;  // Global realtime executor bitflag variable for state management. See EXEC bitmasks.
-  volatile uint8_t rt_exec_alarm;  // Global realtime executor bitflag variable for setting various alarms.
-
   int32_t position[N_AXIS];      // Real-time machine (aka home) position vector in steps. 
                                  // NOTE: This may need to be a volatile variable, if problems arise.                             
 
-  uint8_t homing_axis_lock;       // Locks axes when limits engage. Used as an axis motion mask in the stepper ISR.
-  volatile uint8_t probe_state;   // Probing state value.  Used to coordinate the probing cycle with stepper ISR.
   int32_t probe_position[N_AXIS]; // Last probe position in machine coordinates and steps.
   uint8_t probe_succeeded;        // Tracks if last probing cycle was successful.
+  uint8_t homing_axis_lock;       // Locks axes when limits engage. Used as an axis motion mask in the stepper ISR.
 } system_t;
 extern system_t sys;
 
+volatile uint8_t sys_probe_state;    // Probing state value.  Used to coordinate the probing cycle with stepper ISR.
+volatile uint8_t sys_rt_exec_state;  // Global realtime executor bitflag variable for state management. See EXEC bitmasks.
+volatile uint8_t sys_rt_exec_alarm;  // Global realtime executor bitflag variable for setting various alarms.
+
 
 // Initialize the serial protocol
 void system_init();