No variable spindle and spindle speed fix.

- When VARIABLE_SPINDLE output is disabled in config.h, the last commit
would keep the spindle enable pin disabled when spindle speed is not
defined (S0). This is now ignored and will enable with S0, as spindle
speed is ignored in this mode.

README.md

@@ -27,7 +27,7 @@ Grbl includes full acceleration management with look ahead. That means the contr
 ***
 
 _**Master Branch:**_
-* [Grbl v0.9j Atmega328p 16mhz 115200baud with generic defaults](http://bit.ly/1I8Ey4S) _(2016-03-16)_
+* [Grbl v0.9j Atmega328p 16mhz 115200baud with generic defaults](http://bit.ly/1I8Ey4S) _(2016-03-17)_
   - **IMPORTANT INFO WHEN UPGRADING TO GRBL v0.9 :** 
   - Baudrate is now **115200** (Up from 9600). 
   - Homing cycle updated. Located based on switch trigger, rather than release point.
@@ -48,6 +48,8 @@ _**Archives:**_
 
 ##Update Summary for v0.9j
   - **Restore EEPROM feature:** A new set of restore EEPROM features to help OEMs and users reset their Grbl installation to the build defaults. See Configuring Grbl Wiki for details.
+  - **More configuration options for input pins**
+  - **Bug fixes including:** Soft limit error handling, disable spindle when S0, g-code reporting of G38.x.
   
 ##Update Summary for v0.9i
   - **IMPORTANT:**

doc/log/commit_log_v0.9j.txt

@@ -1,3 +1,14 @@
+----------------
+Date: 2016-03-16
+Author: Sonny Jeon
+Subject: Soft limit handling bug fix
+
+- Soft limit errors were stuck in a feed hold without notifying the
+user why it was in a hold. When resumed, the soft limit error would
+kick in. Issue should be fixed to behave as intended to automatically
+hold and issue a soft limit alarm once the machine has come to a stop.
+
+
 ----------------
 Date: 2016-03-03
 Author: Sonny Jeon

grbl/grbl.h

@@ -23,7 +23,7 @@
 
 // Grbl versioning system
 #define GRBL_VERSION "0.9j"
-#define GRBL_VERSION_BUILD "20160316"
+#define GRBL_VERSION_BUILD "20160317"
 
 // Define standard libraries used by Grbl.
 #include <avr/io.h>

grbl/spindle_control.c

@@ -120,14 +120,13 @@ void spindle_set_state(uint8_t state, float rpm)
       }
       
     #else
-      if (rpm <= 0.0) { spindle_stop(); } // RPM should never be negative, but check anyway.
-      else {
+      // NOTE: Without variable spindle, the enable bit should just turn on or off, regardless
+      // if the spindle speed value is zero, as its ignored anyhow.      
       #ifdef INVERT_SPINDLE_ENABLE_PIN
         SPINDLE_ENABLE_PORT &= ~(1<<SPINDLE_ENABLE_BIT);
       #else
         SPINDLE_ENABLE_PORT |= (1<<SPINDLE_ENABLE_BIT);
       #endif
-      }
     #endif
 
   }