Fix build with and without TOUCH_BUTTONS (#14912)

Marlin/src/lcd/ultralcd.cpp

@@ -764,42 +764,41 @@ void MarlinUI::update() {
 
     // If the action button is pressed...
     static bool wait_for_unclick; // = 0
-    if (touch_buttons) {
-      if (buttons & EN_C) {
-        if (!wait_for_unclick) {                        // If not waiting for a debounce release:
+    #if ENABLED(TOUCH_BUTTONS)
+      if (touch_buttons) {
+        if (!wait_for_unclick && (buttons & EN_C)) {    // If not waiting for a debounce release:
           wait_for_unclick = true;                      //  - Set debounce flag to ignore continous clicks
           lcd_clicked = !wait_for_user && !no_reentry;  //  - Keep the click if not waiting for a user-click
           wait_for_user = false;                        //  - Any click clears wait for user
           quick_feedback();                             //  - Always make a click sound
         }
-      }
-      else if (buttons & (EN_A | EN_B)) {               // Ignore the encoder if clicked, to prevent "slippage"
-        const millis_t ms = millis();
-        if (ELAPSED(ms, next_button_update_ms)) {
-          next_button_update_ms = ms + 50;
-          encoderDiff = (ENCODER_STEPS_PER_MENU_ITEM) * (ENCODER_PULSES_PER_STEP);
-          if (buttons & EN_A) encoderDiff *= -1;
-          if (!wait_for_unclick) {
-            next_button_update_ms += 250;
-            #if HAS_BUZZER
-              buzz(LCD_FEEDBACK_FREQUENCY_DURATION_MS, LCD_FEEDBACK_FREQUENCY_HZ);
-            #endif
-            wait_for_unclick = true;                      //  - Set debounce flag to ignore continous clicks
+        else if (buttons & (EN_A | EN_B)) {             // Ignore the encoder if clicked, to prevent "slippage"
+          const millis_t ms = millis();
+          if (ELAPSED(ms, next_button_update_ms)) {
+            next_button_update_ms = ms + 50;
+            encoderDiff = (ENCODER_STEPS_PER_MENU_ITEM) * (ENCODER_PULSES_PER_STEP);
+            if (buttons & EN_A) encoderDiff *= -1;
+            if (!wait_for_unclick) {
+              next_button_update_ms += 250;
+              #if HAS_BUZZER
+                buzz(LCD_FEEDBACK_FREQUENCY_DURATION_MS, LCD_FEEDBACK_FREQUENCY_HZ);
+              #endif
+              wait_for_unclick = true;                  //  - Set debounce flag to ignore continous clicks
+            }
           }
         }
       }
-    }
-    else {
-      //
-      // Integrated LCD click handling via button_pressed()
-      //
-      if (!external_control && button_pressed()) {
-        if (!wait_for_unclick) {                        // If not waiting for a debounce release:
-          wait_for_unclick = true;                      //  - Set debounce flag to ignore continous clicks
-          lcd_clicked = !wait_for_user && !no_reentry;  //  - Keep the click if not waiting for a user-click
-          wait_for_user = false;                        //  - Any click clears wait for user
-          quick_feedback();                             //  - Always make a click sound
-        }
+      else
+    #endif //TOUCH_BUTTONS
+    //
+    // Integrated LCD click handling via button_pressed()
+    //
+    if (!external_control && button_pressed()) {
+      if (!wait_for_unclick) {                        // If not waiting for a debounce release:
+        wait_for_unclick = true;                      //  - Set debounce flag to ignore continous clicks
+        lcd_clicked = !wait_for_user && !no_reentry;  //  - Keep the click if not waiting for a user-click
+        wait_for_user = false;                        //  - Any click clears wait for user
+        quick_feedback();                             //  - Always make a click sound
       }
     }
     else wait_for_unclick = false;