Addressed void* return warning in all keymaps

keyboard/planck/keymaps/lock/keymap.c

@@ -150,7 +150,7 @@ float start_up[][2] = {
   {440.0*pow(2.0,(64)/12.0), 1000},
 };
 
-void * matrix_init_user(void) {
+void matrix_init_user(void) {
     init_notes();
     play_notes(&start_up, 9, false);
 }

keyboard/planck/planck.c

@@ -1,16 +1,16 @@
 #include "planck.h"
 
 __attribute__ ((weak))
-void * matrix_init_user(void) {
+void matrix_init_user(void) {
 
-};
+}
 
 __attribute__ ((weak))
-void * matrix_scan_user(void) {
+void matrix_scan_user(void) {
 
-};
+}
 
-void * matrix_init_kb(void) {
+void matrix_init_kb(void) {
 	#ifdef BACKLIGHT_ENABLE
     	backlight_init_ports();
 	#endif
@@ -24,13 +24,9 @@ void * matrix_init_kb(void) {
     DDRE |= (1<<6);
     PORTE |= (1<<6);
 
-	if (matrix_init_user) {
-		(*matrix_init_user)();
-	}
-};
+	matrix_init_user();
+}
 
-void * matrix_scan_kb(void) {
-	if (matrix_scan_user) {
-		(*matrix_scan_user)();
-	}
-};
+void matrix_scan_kb(void) {
+	matrix_scan_user();
+}

keyboard/planck/planck.h

@@ -40,7 +40,7 @@
 	{ k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b } \
 }
 
-void * matrix_init_user(void);
-void * matrix_scan_user(void);
+void matrix_init_user(void);
+void matrix_scan_user(void);
 
 #endif