Fixes somes compiler warnings

Marlin/dogm_lcd_implementation.h

@@ -474,6 +474,9 @@ static void lcd_implementation_mark_as_selected(uint8_t row, bool isSelected) {
 }
 
 static void lcd_implementation_drawmenu_generic(bool isSelected, uint8_t row, const char* pstr, char pre_char, char post_char) {
+  UNUSED(pstr);
+  UNUSED(pre_char);
+
   char c;
   uint8_t n = LCD_WIDTH - 2;
 
@@ -564,6 +567,7 @@ void lcd_implementation_drawedit(const char* pstr, const char* value=NULL) {
 #if ENABLED(SDSUPPORT)
 
   static void _drawmenu_sd(bool isSelected, uint8_t row, const char* pstr, const char* filename, char* const longFilename, bool isDir) {
+    UNUSED(pstr);
     char c;
     uint8_t n = LCD_WIDTH - 1;
 

Marlin/planner.cpp

@@ -1057,7 +1057,7 @@ void Planner::check_axes_activity() {
     // This leads to an enormous number of advance steps due to a huge e_acceleration.
     // The math is correct, but you don't want a retract move done with advance!
     // So this situation is filtered out here.
-    if (!bse || (!bsx && !bsy && !bsz) || stepper.get_advance_k() == 0 || bse == allsteps) {
+    if (!bse || (!bsx && !bsy && !bsz) || stepper.get_advance_k() == 0 || (uint32_t) bse == allsteps) {
       block->use_advance_lead = false;
     }
     else {

Marlin/stepper.cpp

@@ -998,7 +998,7 @@ void Stepper::digipot_init() {
 
     SPI.begin();
     pinMode(DIGIPOTSS_PIN, OUTPUT);
-    for (int i = 0; i < COUNT(digipot_motor_current); i++) {
+    for (uint8_t i = 0; i < COUNT(digipot_motor_current); i++) {
       //digitalPotWrite(digipot_ch[i], digipot_motor_current[i]);
       digipot_current(i, digipot_motor_current[i]);
     }

Marlin/temperature.cpp

@@ -462,7 +462,7 @@ int Temperature::getHeaterPower(int heater) {
       EXTRUDER_3_AUTO_FAN_PIN == EXTRUDER_2_AUTO_FAN_PIN ? 2 : 3
     };
     uint8_t fanState = 0;
-    for (int f = 0; f <= HOTENDS; f++) {
+    for (int f = 0; f < HOTENDS; f++) {
       if (current_temperature[f] > EXTRUDER_AUTO_FAN_TEMPERATURE)
         SBI(fanState, fanBit[f]);
     }

Marlin/ultralcd_st7920_u8glib_rrd.h

@@ -135,7 +135,7 @@ u8g_dev_t u8g_dev_st7920_128x64_rrd_sw_spi = {u8g_dev_rrd_st7920_128x64_fn, &u8g
 
 class U8GLIB_ST7920_128X64_RRD : public U8GLIB {
  public:
-  U8GLIB_ST7920_128X64_RRD(uint8_t dummy) : U8GLIB(&u8g_dev_st7920_128x64_rrd_sw_spi) {}
+  U8GLIB_ST7920_128X64_RRD(uint8_t dummy) : U8GLIB(&u8g_dev_st7920_128x64_rrd_sw_spi) { UNUSED(dummy); }
 };