Minor updates to line number feature.

- Changed line number integer types from unsigned to signed int32.
G-code mandates values cannot exceed 99999. Negative values can be used
to indicate certain modes.

- Homing cycle line number changed to -1, as an indicator.

- Fixed a reporting define for the spindle states that was broken by
the last merge.

config.h

@@ -28,10 +28,6 @@
 #ifndef config_h
 #define config_h
 
-// Allows GRBL to tranck and report gcode line numbers.  Enabling this means that the planning buffer
-// goes from 18 or 16 to make room for the additional line number data in the plan_block_t struct
-#define USE_LINE_NUMBERS
-
 // Default settings. Used when resetting EEPROM. Change to desired name in defaults.h
 #define DEFAULTS_SHERLINE_5400
 
@@ -88,6 +84,10 @@
 // parser state depending on user preferences.
 #define N_STARTUP_LINE 2 // Integer (1-3)
 
+// Allows GRBL to tranck and report gcode line numbers.  Enabling this means that the planning buffer
+// goes from 18 or 16 to make room for the additional line number data in the plan_block_t struct
+// #define USE_LINE_NUMBERS
+
 // Enables a second coolant control pin via the mist coolant g-code command M7 on the Arduino Uno
 // analog pin 5. Only use this option if you require a second coolant control pin.
 // NOTE: The M8 flood coolant control pin on analog pin 4 will still be functional regardless.