Inverted state logic for forced_heating_stop variable

Marlin/Marlin_main.cpp

       /* See if we are heating up or cooling down */
       target_direction = isHeatingHotend(tmp_extruder); // true if heating, false if cooling
       
-      forced_heating_stop = true;
+      forced_heating_stop = false;
 
       #ifdef TEMP_RESIDENCY_TIME
         long residencyStart;
         residencyStart = -1;
         /* continue to loop until we have reached the target temp
           _and_ until TEMP_RESIDENCY_TIME hasn't passed since we reached it */
-        while((forced_heating_stop == true)&&((residencyStart == -1) ||
+        while((forced_heating_stop == false)&&((residencyStart == -1) ||
               (residencyStart >= 0 && (((unsigned int) (millis() - residencyStart)) < (TEMP_RESIDENCY_TIME * 1000UL)))) ) {
       #else
         while ( target_direction ? (isHeatingHotend(tmp_extruder)) : (isCoolingHotend(tmp_extruder)&&(CooldownNoWait==false)) ) {

Marlin/ultralcd.cpp

 int absPreheatHPBTemp;
 int absPreheatFanSpeed;
 
-boolean forced_heating_stop = true ;
+boolean forced_heating_stop = false ;
 
 #ifdef ULTIPANEL
 static float manual_feedrate[] = MANUAL_FEEDRATE;
     }
     autotempShutdown();
     
-    forced_heating_stop = false;
+    forced_heating_stop = true;
 }
 
 /* Menu implementation */