Optional line number reporting bug fix.

- Fixed a bug where it would not compile when USE_LINE_NUMBERS was
enabled.

grbl/config.h

@@ -238,7 +238,6 @@
 // The hardware PWM output on pin D11 is required for variable spindle output voltages.
 #define VARIABLE_SPINDLE // Default enabled. Comment to disable.
 
-
 // Used by variable spindle output only. This forces the PWM output to a minimum duty cycle when enabled.
 // The PWM pin will still read 0V when the spindle is disabled. Most users will not need this option, but
 // it may be useful in certain scenarios. This minimum PWM settings coincides with the spindle rpm minimum

grbl/grbl.h

@@ -23,7 +23,7 @@
 
 // Grbl versioning system
 #define GRBL_VERSION "1.0b"
-#define GRBL_VERSION_BUILD "20150824"
+#define GRBL_VERSION_BUILD "20150829"
 
 // Define standard libraries used by Grbl.
 #include <avr/io.h>

grbl/motion_control.c

@@ -67,7 +67,7 @@
   } while (1);
 
   // Plan and queue motion into planner buffer
-//   uint8_t plan_status; // Not used in normal operation.
+  // uint8_t plan_status; // Not used in normal operation.
   #ifdef USE_LINE_NUMBERS
     plan_buffer_line(target, feed_rate, invert_feed_rate, false, line_number);
   #else
@@ -333,7 +333,11 @@ void mc_parking_motion(float *parking_target, float feed_rate)
 {
   if (sys.abort) { return; } // Block during abort.
   
-  uint8_t plan_status = plan_buffer_line(parking_target, feed_rate, false, true);
+  #ifdef USE_LINE_NUMBERS
+    uint8_t plan_status = plan_buffer_line(parking_target, feed_rate, false, true, PARKING_MOTION_LINE_NUMBER);
+  #else
+    uint8_t plan_status = plan_buffer_line(parking_target, feed_rate, false, true);
+  #endif
   if (plan_status) {
 		bit_true(sys.step_control, STEP_CONTROL_EXECUTE_PARK); 
 		bit_false(sys.step_control, STEP_CONTROL_END_MOTION); // Allow parking motion to execute, if feed hold is active.

grbl/motion_control.h

@@ -24,6 +24,7 @@
 
 
 #define HOMING_CYCLE_LINE_NUMBER -1
+#define PARKING_MOTION_LINE_NUMBER -2
 
 // Execute linear motion in absolute millimeter coordinates. Feed rate given in millimeters/second
 // unless invert_feed_rate is true. Then the feed_rate means that the motion should be completed in