Get rid of free_multi()

In fact, it causes a lot of problem. Seems to work at first glance, but I was wrong, more tests prove it's buggy. Only used once now, can be removed...

src/cpu-x.h

@@ -256,9 +256,6 @@ char *msg_error(char *color, char *file, int line, char *str);
 	   casprintf(&str, true,  "%i KB %i-way", -1, 12): str = "12-way" */
 int casprintf(char **str, bool clean_str, const char *fmt, ...);
 
-/* Try to free given variables */
-void free_multi(void *var, ...);
-
 /* Return a formatted string */
 char *format(char *str, ...);
 

src/main.c

@@ -749,7 +749,7 @@ static void sighandler(int signum)
 	MSG_STDERR("https://github.com/X0rg/CPU-X/issues/new\n");
 
 	/* Stop program */
-	free_multi(bt_syms, bt);
+	free(bt_syms);
 	signal(signum, SIG_DFL);
 	kill(getpid(), signum);
 }

src/util.c

@@ -130,25 +130,6 @@ int casprintf(char **str, bool clean_str, const char *fmt, ...)
 	return j;
 }
 
-/* Try to free given variables */
-void free_multi(void *var, ...)
-{
-	void *ptr, *sentinel = NULL;
-	va_list aptr;
-
-	va_start(aptr, var);
-	free(var);
-
-	while((ptr = va_arg(aptr, void *)) != NULL && ptr != sentinel)
-	{
-		if(sentinel == NULL)
-			sentinel = ptr;
-		free(ptr);
-	}
-
-	va_end(aptr);
-}
-
 /* Return a formatted string */
 char *format(char *str, ...)
 {