Some fixes

- Fix UB in playerCreate (it had no return)
- Now Screen has field of Points, not chars

include/screen.h

@@ -1,13 +1,13 @@
 #ifndef __SCREEN_H__
 #define __SCREEN_H__
 
+typedef char Point;
 typedef struct screen_t
 {
     int width;
     int height;
-    char *screen;
+    Point *screen;
 } Screen;
-typedef char Point;
 
 Screen *screenCreate(int width, int height, Point fill_value);
 void screenFree(Screen *screen);

src/player.c

@@ -15,6 +15,8 @@ Player *playerCreate(Direction direction, int x, int y, int score)
     player->head = head;
     player->score = score;
     player->direction = direction;
+
+    return player;
 }
 
 void playerFree(Player *player)

src/screen.c

@@ -44,7 +44,7 @@ void screenShow(Screen *screen)
     }
 }
 
-void screenSet(Screen *screen, char fill_value)
+void screenSet(Screen *screen, Point fill_value)
 {
     memset(screen->screen, fill_value, screen->width * screen->height * sizeof(char));
 }