Simplify init with ARRAY_BY_EXTRUDERS1 macro (PR#2507)

Marlin/Conditionals.h

     #define ARRAY_BY_EXTRUDERS(v1, v2, v3, v4) { v1 }
   #endif
 
+  #define ARRAY_BY_EXTRUDERS1(v1) ARRAY_BY_EXTRUDERS(v1, v1, v1, v1)
+
   /**
    * Shorthand for pin tests, used wherever needed
    */

Marlin/Marlin_main.cpp

 bool axis_relative_modes[] = AXIS_RELATIVE_MODES;
 int feedrate_multiplier = 100; //100->1 200->2
 int saved_feedrate_multiplier;
-int extruder_multiplier[EXTRUDERS] = ARRAY_BY_EXTRUDERS(100, 100, 100, 100);
+int extruder_multiplier[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(100);
 bool volumetric_enabled = false;
-float filament_size[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_NOMINAL_FILAMENT_DIA, DEFAULT_NOMINAL_FILAMENT_DIA, DEFAULT_NOMINAL_FILAMENT_DIA, DEFAULT_NOMINAL_FILAMENT_DIA);
-float volumetric_multiplier[EXTRUDERS] = ARRAY_BY_EXTRUDERS(1.0, 1.0, 1.0, 1.0);
+float filament_size[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(DEFAULT_NOMINAL_FILAMENT_DIA);
+float volumetric_multiplier[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(1.0);
 float home_offset[3] = { 0 };
 float min_pos[3] = { X_MIN_POS, Y_MIN_POS, Z_MIN_POS };
 float max_pos[3] = { X_MAX_POS, Y_MAX_POS, Z_MAX_POS };

Marlin/temperature.cpp

 
 #ifdef PIDTEMP
   #ifdef PID_PARAMS_PER_EXTRUDER
-    float Kp[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kp, DEFAULT_Kp, DEFAULT_Kp, DEFAULT_Kp);
-    float Ki[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT, DEFAULT_Ki*PID_dT);
-    float Kd[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT, DEFAULT_Kd / PID_dT);
+    float Kp[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(DEFAULT_Kp);
+    float Ki[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(DEFAULT_Ki*PID_dT);
+    float Kd[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(DEFAULT_Kd / PID_dT);
     #ifdef PID_ADD_EXTRUSION_RATE
-      float Kc[EXTRUDERS] = ARRAY_BY_EXTRUDERS(DEFAULT_Kc, DEFAULT_Kc, DEFAULT_Kc, DEFAULT_Kc);
+      float Kc[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(DEFAULT_Kc);
     #endif // PID_ADD_EXTRUSION_RATE
   #else //PID_PARAMS_PER_EXTRUDER
     float Kp = DEFAULT_Kp;
 static int minttemp_raw[EXTRUDERS] = ARRAY_BY_EXTRUDERS( HEATER_0_RAW_LO_TEMP , HEATER_1_RAW_LO_TEMP , HEATER_2_RAW_LO_TEMP, HEATER_3_RAW_LO_TEMP);
 static int maxttemp_raw[EXTRUDERS] = ARRAY_BY_EXTRUDERS( HEATER_0_RAW_HI_TEMP , HEATER_1_RAW_HI_TEMP , HEATER_2_RAW_HI_TEMP, HEATER_3_RAW_HI_TEMP);
 static int minttemp[EXTRUDERS] = { 0 };
-static int maxttemp[EXTRUDERS] = ARRAY_BY_EXTRUDERS( 16383, 16383, 16383, 16383 );
+static int maxttemp[EXTRUDERS] = ARRAY_BY_EXTRUDERS1(16383);
 #ifdef BED_MINTEMP
 static int bed_minttemp_raw = HEATER_BED_RAW_LO_TEMP;
 #endif