[1.1.x] Fix compiler warning (MarlinFirmware#15642)

esheffield · Oct 24, 2019 · e068f66 · e068f66
1 parent 5754472
commit e068f66
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/Marlin/planner.cpp b/Marlin/planner.cpp
@@ -1169,8 +1169,11 @@ void Planner::recalculate() {
  * Maintain fans, paste extruder pressure,
  */
 void Planner::check_axes_activity() {
-  unsigned char axis_active[NUM_AXIS] = { 0 },
-                tail_fan_speed[FAN_COUNT];
+  uint8_t axis_active[NUM_AXIS] = { 0 };
+
+  #if FAN_COUNT > 0
+    uint8_t tail_fan_speed[FAN_COUNT] = { 0 };
+  #endif
 
   #if ENABLED(BARICUDA)
     #if HAS_HEATER_1