Apply HAS_HOTEND_OFFSET where needed

Marlin/src/gcode/calibrate/G34_M422.cpp

@@ -230,13 +230,13 @@ void GcodeSuite::G34() {
 
     // Restore the active tool after homing
     #if HOTENDS > 1
-      tool_change(old_tool_index, 0,
+      tool_change(old_tool_index, 0, (
         #if ENABLED(PARKING_EXTRUDER)
           false // Fetch the previous toolhead
         #else
           true
         #endif
-      );
+      ));
     #endif
 
     #if HAS_LEVELING

Marlin/src/gcode/calibrate/G425.cpp

@@ -418,7 +418,7 @@ inline void probe_sides(measurements_t &m, const float uncertainty) {
     SERIAL_EOL();
   }
 
-  #if HOTENDS > 1
+  #if HAS_HOTEND_OFFSET
     //
     // This function requires normalize_hotend_offsets() to be called
     //
@@ -642,7 +642,7 @@ void GcodeSuite::G425() {
       report_measured_backlash(m);
       report_measured_nozzle_dimensions(m);
       report_measured_positional_error(m);
-      #if HOTENDS > 1
+      #if HAS_HOTEND_OFFSET
         normalize_hotend_offsets();
         report_hotend_offsets();
       #endif

Marlin/src/gcode/gcode.cpp

@@ -516,7 +516,7 @@ void GcodeSuite::process_parsed_command(
         case 217: M217(); break;                                  // M217: Set filament swap parameters
       #endif
 
-      #if HOTENDS > 1
+      #if HAS_HOTEND_OFFSET
         case 218: M218(); break;                                  // M218: Set a tool offset
       #endif
 

Marlin/src/gcode/gcode.h

@@ -637,7 +637,7 @@ private:
     static void M217();
   #endif
 
-  #if HOTENDS > 1
+  #if HAS_HOTEND_OFFSET
     static void M218();
   #endif
 

Marlin/src/inc/Conditionals_post.h

@@ -431,7 +431,7 @@
 /**
  * Default hotend offsets, if not defined
  */
-#if HOTENDS > 1
+#if HAS_HOTEND_OFFSET
   #ifndef HOTEND_OFFSET_X
     #define HOTEND_OFFSET_X { 0 } // X offsets for each extruder
   #endif

Marlin/src/lcd/dogm/status_screen_lite_ST7920.cpp

@@ -580,12 +580,7 @@ void ST7920_Lite_Status_Screen::draw_extruder_2_temp(const int16_t temp, const i
 #if HAS_HEATED_BED
   void ST7920_Lite_Status_Screen::draw_bed_temp(const int16_t temp, const int16_t target, bool forceUpdate) {
     const bool show_target = target && FAR(temp, target);
-    draw_temps(1
-      #if HOTENDS > 1
-        + 1
-      #endif
-      , temp, target, show_target, display_state.bed_show_target != show_target || forceUpdate
-    );
+    draw_temps(HOTENDS > 1 ? 2 : 1, temp, target, show_target, display_state.bed_show_target != show_target || forceUpdate);
     display_state.bed_show_target = show_target;
   }
 #endif

Marlin/src/lcd/extensible_ui/ui_api.cpp

@@ -530,7 +530,7 @@ namespace ExtUI {
     }
   #endif // HAS_BED_PROBE
 
-  #if HOTENDS > 1
+  #if HAS_HOTEND_OFFSET
 
     float getNozzleOffset_mm(const axis_t axis, const extruder_t extruder) {
       if (extruder - E0 >= HOTENDS) return 0;
@@ -552,7 +552,7 @@ namespace ExtUI {
       HOTEND_LOOP() hotend_offset[axis][e] -= offs;
     }
 
-  #endif // HOTENDS > 1
+  #endif // HAS_HOTEND_OFFSET
 
   #if ENABLED(BACKLASH_GCODE)
     float getAxisBacklash_mm(const axis_t axis)       { return backlash_distance_mm[axis]; }

Marlin/src/lcd/extensible_ui/ui_api.h

@@ -144,7 +144,7 @@ namespace ExtUI {
     void smartAdjustAxis_steps(const int16_t steps, const axis_t axis, bool linked_nozzles);
   #endif
 
-  #if HOTENDS > 1
+  #if HAS_HOTEND_OFFSET
     float getNozzleOffset_mm(const axis_t, const extruder_t);
     void setNozzleOffset_mm(const float, const axis_t, const extruder_t);
     void normalizeNozzleOffset(const axis_t axis);

Marlin/src/lcd/menu/menu_advanced.cpp

@@ -300,8 +300,9 @@ void menu_tmc();
   #define DEFINE_PIDTEMP_FUNCS(N) _DEFINE_PIDTEMP_BASE_FUNCS(N); //
 #endif
 
-DEFINE_PIDTEMP_FUNCS(0);
-#if ENABLED(PID_PARAMS_PER_HOTEND)
+#if HOTENDS
+  DEFINE_PIDTEMP_FUNCS(0);
+  #if ENABLED(PID_PARAMS_PER_HOTEND)
     #if HOTENDS > 1
       DEFINE_PIDTEMP_FUNCS(1);
       #if HOTENDS > 2
@@ -317,7 +318,8 @@ DEFINE_PIDTEMP_FUNCS(0);
         #endif // HOTENDS > 3
       #endif // HOTENDS > 2
     #endif // HOTENDS > 1
-#endif // PID_PARAMS_PER_HOTEND
+  #endif // PID_PARAMS_PER_HOTEND
+#endif // HOTENDS
 
 #define SHOW_MENU_ADVANCED_TEMPERATURE ((ENABLED(AUTOTEMP) && HAS_TEMP_HOTEND) || ENABLED(PID_AUTOTUNE_MENU) || ENABLED(PID_EDIT_MENU))