Apply const float & more

Marlin/Marlin_main.cpp

@@ -2355,7 +2355,7 @@ static void clean_up_after_endstop_or_probe_move() {
    *   - Raise to the BETWEEN height
    * - Return the probed Z position
    */
-  float probe_pt(const float x, const float y, const bool stow/*=true*/, const int verbose_level/*=1*/) {
+  float probe_pt(const float &x, const float &y, const bool stow/*=true*/, const int verbose_level/*=1*/) {
     #if ENABLED(DEBUG_LEVELING_FEATURE)
       if (DEBUGGING(LEVELING)) {
         SERIAL_ECHOPAIR(">>> probe_pt(", x);

Marlin/least_squares_fit.h

@@ -52,7 +52,7 @@ void inline incremental_LSF_reset(struct linear_fit_data *lsf) {
   memset(lsf, 0, sizeof(linear_fit_data));
 }
 
-void inline incremental_WLSF(struct linear_fit_data *lsf, float x, float y, float z, float w) {
+void inline incremental_WLSF(struct linear_fit_data *lsf, const float &x, const float &y, const float &z, const float &w) {
   // weight each accumulator by factor w, including the "number" of samples
   // (analagous to calling inc_LSF twice with same values to weight it by 2X)
   lsf->xbar  += w * x;
@@ -69,7 +69,7 @@ void inline incremental_WLSF(struct linear_fit_data *lsf, float x, float y, floa
   lsf->max_absy = max(fabs(w * y), lsf->max_absy);
 }
 
-void inline incremental_LSF(struct linear_fit_data *lsf, float x, float y, float z) {
+void inline incremental_LSF(struct linear_fit_data *lsf, const float &x, const float &y, const float &z) {
   lsf->xbar += x;
   lsf->ybar += y;
   lsf->zbar += z;

Marlin/ubl_G29.cpp

@@ -51,10 +51,10 @@
   extern uint8_t code_value_byte();
   extern bool code_value_bool();
   extern bool code_has_value();
-  extern float probe_pt(float x, float y, bool, int);
+  extern float probe_pt(const float &x, const float &y, bool, int);
   extern bool set_probe_deployed(bool);
   void smart_fill_mesh();
-  void smart_fill_wlsf(float);
+  void smart_fill_wlsf(const float &);
   float measure_business_card_thickness(float &in_height);
   void manually_probe_remaining_mesh(const float&, const float&, const float&, const float&, const bool);
 
@@ -541,8 +541,8 @@
                   // P3.12 100X distance weighting
                   // P3.13 1000X distance weighting, approaches simple average of nearest points
 
-                  const float weight_power  = (cvf - 3.10) * 100.0;  // 3.12345 -> 2.345
+                  const float weight_power  = (cvf - 3.10) * 100.0,  // 3.12345 -> 2.345
-                  const float weight_factor = weight_power ? pow( 10.0, weight_power ) : 0;
+                              weight_factor = weight_power ? pow(10.0, weight_power) : 0;
                   smart_fill_wlsf(weight_factor);
                 }
                 break;