Fixing header's dependencies.

lib/card.c

@@ -1,6 +1,5 @@
 #include <ncurses.h>
 #include <malloc.h>
-#include "frame.h"
 #include "card.h"
 
 struct card *initialize_card() {

lib/card.h

@@ -1,6 +1,8 @@
 #ifndef CARD_H
 #define CARD_H
 
+#include "frame.h"
+
 enum value {
   NO_VALUE = -1,
   TWO      = 2,

lib/display.c

@@ -2,8 +2,6 @@
 #include <malloc.h>
 #include <string.h>
 #include <locale.h>
-#include "frame.h"
-#include "card.h"
 #include "display.h"
 
 void init_curses() {

lib/frame.c

@@ -1,4 +1,3 @@
-#include <ncurses.h>
 #include <malloc.h>
 #include "frame.h"
 

lib/frame.h

@@ -1,6 +1,8 @@
 #ifndef FRAME_H
 #define FRAME_H
 
+#include <ncurses.h>
+
 #define FRAME_WIDTH  7
 #define FRAME_HEIGHT 5
 

lib/stack.c

@@ -1,6 +1,5 @@
 #include <malloc.h>
 #include <stdbool.h>
-#include "card.h"
 #include "stack.h"
 
 void initialize_stack(struct stack **stack) {

lib/stack.h

@@ -1,6 +1,8 @@
 #ifndef STACK_H
 #define STACK_H
 
+#include "card.h"
+
 struct stack {
   struct card  *card;
   struct stack *next;