Followup for #3813

Marlin/printcounter.cpp

@@ -128,7 +128,7 @@ void PrintCounter::tick() {
   }
 
   // Trying to get the amount of calculations down to the bare min
-  const static uint16_t j = this->saveInterval * 1000;
+  const static uint32_t j = this->saveInterval * 1000;
 
   if (now - eeprom_before >= j) {
     eeprom_before = now;
@@ -164,6 +164,7 @@ bool PrintCounter::stop() {
     this->data.finishedPrints++;
     this->data.printTime += this->deltaDuration();
     this->saveStats();
+    return true;
   }
   else return false;
 }

Marlin/printcounter.h

@@ -55,6 +55,9 @@ class PrintCounter: public Stopwatch {
      * @brief Interval in seconds between counter updates
      * @details This const value defines what will be the time between each
      * accumulator update. This is different from the EEPROM save interval.
+     *
+     * @note The max value for this option is 60(s), otherwise integer
+     * overflow will happen.
      */
     const uint16_t updateInterval = 10;