Use IS_SD_PRINTING() more

Marlin/src/gcode/queue.cpp

@@ -749,7 +749,7 @@ inline void get_serial_commands() {
 
           card.printingHasFinished();
 
-          if (card.sdprinting)
+          if (IS_SD_PRINTING())
             sd_count = 0; // If a sub-file was printing, continue from call point
           else {
             SERIAL_PROTOCOLLNPGM(MSG_FILE_PRINTED);
@@ -888,7 +888,7 @@ void advance_command_queue() {
     else {
       gcode.process_next_command();
       #if ENABLED(POWER_LOSS_RECOVERY)
-        if (card.cardOK && card.sdprinting) save_job_recovery_info();
+        if (card.cardOK && IS_SD_PRINTING()) save_job_recovery_info();
       #endif
     }