add resetPID function

Firmware/temperature.h

@@ -128,12 +128,15 @@ FORCE_INLINE float degTargetBed() {
 
 FORCE_INLINE void setTargetHotend(const float &celsius, uint8_t extruder) {  
   target_temperature[extruder] = celsius;
-  resetPID[extruder];
+  resetPID(extruder);
 };
 
 static inline void setTargetHotendSafe(const float &celsius, uint8_t extruder)
 {
-    if (extruder<EXTRUDERS) target_temperature[extruder] = celsius;
+    if (extruder<EXTRUDERS) {
+      target_temperature[extruder] = celsius;
+      resetPID(extruder);
+    }
 }
 
 static inline void setAllTargetHotends(const float &celsius)