Minor cleanup of homeaxis, etc.

Marlin/Marlin_main.cpp

     #endif
   #endif
 
-  #define DEPLOY_PROBE() set_probe_deployed( true )
-  #define STOW_PROBE() set_probe_deployed( false )
+  #define DEPLOY_PROBE() set_probe_deployed(true)
+  #define STOW_PROBE() set_probe_deployed(false)
 
   // returns false for ok and true for failure
   static bool set_probe_deployed(bool deploy) {
       if (axis_unhomed_error(true, true,  true )) { stop(); return true; }
     #endif
 
-    float oldXpos = current_position[X_AXIS]; // save x position
-    float oldYpos = current_position[Y_AXIS]; // save y position
+    float oldXpos = current_position[X_AXIS],
+          oldYpos = current_position[Y_AXIS];
 
     #ifdef _TRIGGERED_WHEN_STOWED_TEST
 
 #define HOMEAXIS(LETTER) homeaxis(LETTER##_AXIS)
 
 static void homeaxis(AxisEnum axis) {
-  #define HOMEAXIS_DO(LETTER) \
-    ((LETTER##_MIN_PIN > -1 && LETTER##_HOME_DIR==-1) || (LETTER##_MAX_PIN > -1 && LETTER##_HOME_DIR==1))
+  #define CAN_HOME(A) \
+    (axis == A##_AXIS && ((A##_MIN_PIN > -1 && A##_HOME_DIR < 0) || (A##_MAX_PIN > -1 && A##_HOME_DIR > 0)))
 
-  if (!(axis == X_AXIS ? HOMEAXIS_DO(X) : axis == Y_AXIS ? HOMEAXIS_DO(Y) : axis == Z_AXIS ? HOMEAXIS_DO(Z) : false)) return;
+  if (!CAN_HOME(X) && !CAN_HOME(Y) && !CAN_HOME(Z)) return;
 
   #if ENABLED(DEBUG_LEVELING_FEATURE)
     if (DEBUGGING(LEVELING)) {
   #endif
 
   // Put away the Z probe
-  #if HAS_BED_PROBE && Z_HOME_DIR < 0 && DISABLED(Z_MIN_PROBE_ENDSTOP)
+  #if HOMING_Z_WITH_PROBE
     if (axis == Z_AXIS) {
       #if ENABLED(DEBUG_LEVELING_FEATURE)
         if (DEBUGGING(LEVELING)) SERIAL_ECHOPGM("> ");
         #if ENABLED(Z_SAFE_HOMING)
 
           #if ENABLED(DEBUG_LEVELING_FEATURE)
-            if (DEBUGGING(LEVELING)) {
-              SERIAL_ECHOLNPGM("> Z_SAFE_HOMING >>>");
-            }
+            if (DEBUGGING(LEVELING)) SERIAL_ECHOLNPGM("> Z_SAFE_HOMING >>>");
           #endif
 
           if (home_all_axis) {
             destination[Z_AXIS] = current_position[Z_AXIS]; // Z is already at the right height
 
             #if ENABLED(DEBUG_LEVELING_FEATURE)
-              if (DEBUGGING(LEVELING)) {
-                DEBUG_POS("> Z_SAFE_HOMING > home_all_axis", current_position);
-                DEBUG_POS("> Z_SAFE_HOMING > home_all_axis", destination);
-              }
+              if (DEBUGGING(LEVELING)) DEBUG_POS("> Z_SAFE_HOMING > home_all_axis", destination);
             #endif
 
             // Move in the XY plane