Fixed so will compile both with and without underglow

keyboards/ergodox/ez/keymaps/drashna/keymap.c

@@ -17,6 +17,8 @@
 #define MOUS 2
 
 #ifdef LAYER_UNDERGLOW_LIGHTING
+bool has_layer_changed = true;
+
 #define rgblight_set_teal rgblight_setrgb(0x00, 0xFF, 0xFF)
 #define rgblight_set_red rgblight_setrgb(0xFF, 0x00, 0x00)
 #define rgblight_set_blue rgblight_setrgb(0x00, 0xFF, 0x00);
@@ -98,20 +100,12 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
   return true;
 }
 
-void matrix_init_user(void) { // Runs boot tasks for keyboard
+
-    
-#ifdef LAYER_UNDERGLOW_LIGHTING
-    rgblight_set_teal;
-#endif 
-    
-};
 
 
 void matrix_scan_user(void) {
 
-    static uint8_t old_layer = 0;
     uint8_t new_layer = biton32(layer_state);
-    uint8_t modifiders = get_mods();
     
     ergodox_board_led_off();
     ergodox_right_led_1_off();
@@ -119,6 +113,9 @@ void matrix_scan_user(void) {
     ergodox_right_led_3_off();
     
 #ifdef LAYER_UNDERGLOW_LIGHTING
+    static uint8_t old_layer = 0;
+    uint8_t modifiders = get_mods();
+    
     if ( modifiders & MODS_SHIFT_MASK) {
             ergodox_right_led_1_on();
     }
@@ -128,7 +125,12 @@ void matrix_scan_user(void) {
     if ( modifiders & MODS_ALT_MASK) {
             ergodox_right_led_3_on();
     }
+    
     if (old_layer != new_layer) {
+        has_layer_changed = true; 
+        old_layer = new_layer;
+    }
+    if (has_layer_changed) {
         switch (new_layer) {
             case 1:
                 rgblight_set_red;
@@ -155,9 +157,11 @@ void matrix_scan_user(void) {
                 rgblight_set_teal;
                 break;
         }
-     }
+        has_layer_changed = false;
+    }
+    
 #else    
-    switch (layer) {
+    switch (new_layer) {
         case 1:
             ergodox_right_led_1_on();
             break;
@@ -188,5 +192,4 @@ void matrix_scan_user(void) {
             break;
      }
 #endif 
-    old_layer = new_layer;
 };