Linked stack in C

stack.c

#include "..\Header\stack.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

void stackinit(Stack * stack)
{
        stack->top = NULL;
        stack->top->next = NULL;
        stack->isempty = true;
}

void stackpush(Stack * stack, int value)
{
        if(stack->top == NULL)
                stack->isempty = false;
        stack->top->next = stack->top;
        stack->top = malloc(sizeof(Node));
        stack->top->value = value;
}

int stackpop(Stack * stack)
{
	Node * temp;
	int value = stack->top->value;
	if(stack->top->next == NULL)
	{
		stack->isempty = true;
	}
	temp = stack->top;
	stack->top = stack->top->next;
	free(temp);
	return value;
}

void stackdispose(Stack * stack)
{
        while(! stack->isempty)
        	stackpop(&stack);
}

stack.h

typedef struct node_t
{
    int value;
    struct node_t * next;
} Node;

typedef struct stack_t
{
	Node * top;
    int isempty;

} Stack;

void stackinit(Stack*);
void stackpush(Stack*, int);
int stackpop(Stack*);
void stackdispose(Stack*);