Added compile time default for 4LD usermod.

usermods/usermod_v2_four_line_display/usermod_v2_four_line_display.h

@@ -78,6 +78,14 @@
   #endif
 #endif
 
+#ifndef FLD_TYPE
+  #ifndef FLD_SPI_DEFAULT
+    #define FLD_TYPE SSD1306
+  #else
+    #define FLD_TYPE SSD1306_SPI
+  #endif
+#endif
+
 // When to time out to the clock or blank the screen
 // if SLEEP_MODE_ENABLED.
 #define SCREEN_TIMEOUT_MS  60*1000    // 1 min
@@ -123,10 +131,10 @@ class FourLineDisplayUsermod : public Usermod {
     #ifndef FLD_SPI_DEFAULT
     int8_t ioPin[5] = {FLD_PIN_SCL, FLD_PIN_SDA, -1, -1, -1};        // I2C pins: SCL, SDA
     uint32_t ioFrequency = 400000;  // in Hz (minimum is 100000, baseline is 400000 and maximum should be 3400000)
-    DisplayType type = SSD1306;     // display type
+    DisplayType type = FLD_TYPE;    // display type
     #else
     int8_t ioPin[5] = {FLD_PIN_CLOCKSPI, FLD_PIN_DATASPI, FLD_PIN_CS, FLD_PIN_DC, FLD_PIN_RESET}; // SPI pins: CLK, MOSI, CS, DC, RST
-    DisplayType type = SSD1306_SPI; // display type
+    DisplayType type = FLD_TYPE;    // display type
     #endif
     bool flip = false;              // flip display 180°
     uint8_t contrast = 10;          // screen contrast