Initialize Layer State on startup

tmk_core/common/action_layer.h

@@ -85,6 +85,8 @@ void layer_invert(uint8_t layer);
 void layer_or(layer_state_t state);
 void layer_and(layer_state_t state);
 void layer_xor(layer_state_t state);
+layer_state_t layer_state_set_user(layer_state_t state);
+layer_state_t layer_state_set_kb(layer_state_t state);
 #else
 #    define layer_state 0
 
@@ -101,10 +103,10 @@ void layer_xor(layer_state_t state);
 #    define layer_or(state) (void)state
 #    define layer_and(state) (void)state
 #    define layer_xor(state) (void)state
+#    define layer_state_set_kb(state) (void)state
+#    define layer_state_set_user(state) (void)state
 #endif
 
-layer_state_t layer_state_set_user(layer_state_t state);
-layer_state_t layer_state_set_kb(layer_state_t state);
 
 /* pressed actions cache */
 #if !defined(NO_ACTION_LAYER) && !defined(STRICT_LAYER_RELEASE)

tmk_core/common/bootmagic.c

@@ -122,6 +122,8 @@ void bootmagic(void) {
         default_layer = eeconfig_read_default_layer();
         default_layer_set((layer_state_t)default_layer);
     }
+    /* Also initialize layer state to trigger callback functions for layer_state */
+    layer_state_set_kb((layer_state_t)layer_state);
 
     /* EE_HANDS handedness */
     if (bootmagic_scan_keycode(BOOTMAGIC_KEY_EE_HANDS_LEFT)) {

tmk_core/common/magic.c

@@ -33,4 +33,7 @@ void magic(void) {
     uint8_t default_layer = 0;
     default_layer         = eeconfig_read_default_layer();
     default_layer_set((layer_state_t)default_layer);
+
+    /* Also initialize layer state to trigger callback functions for layer_state */
+    layer_state_set_kb((layer_state_t)layer_state);
 }