Do not use malloc() or xmalloc()

Use mem_malloc() instead which automatically picks the right
implementation depending on whether memory debugging is enabled or not.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/vector.c

@@ -43,7 +43,7 @@ void vector_init(vector_t *v, unsigned size)
 {
 	v->count = 0;
 	v->size = size;
-	v->data = malloc(size * sizeof(void *));
+	v->data = mem_malloc(size * sizeof(void *));
 }
 
 /*