Merge pull request #3769 from jbrazio/bugfix/iteration-invokes-undef-behavior

Bugfix: iteration invokes undefined behavior
9 years ago · 58339aea5f
1 changed files with 1 additions and 1 deletions
--- a/Marlin/temperature.cpp
+++ b/Marlin/temperature.cpp
@ -342,7 +342,7 @@ int Temperature::getHeaterPower(int heater) {
      EXTRUDER_3_AUTO_FAN_PIN == EXTRUDER_2_AUTO_FAN_PIN ? 2 : 3
    };
    uint8_t fanState = 0;
-    for (int f = 0; f <= 3; f++) {
+    for (int f = 0; f <= EXTRUDERS; f++) {
      if (current_temperature[f] > EXTRUDER_AUTO_FAN_TEMPERATURE)
        SBI(fanState, fanBit[f]);
    }