core: Add state-wide pointer box field

Signed-off-by: Ian Moffett <ian@mirocom.org>

core/state.c

@@ -16,7 +16,13 @@ rifle_state_init(struct rifle_state *state, const char *in_path)
         return -1;
     }
 
+    if (ptrbox_init(&state->ptrbox) < 0) {
+        close(state->in_fd);
+        return -1;
+    }
+
     if (tokbuf_init(&state->tokbuf) < 0) {
+        ptrbox_destroy(&state->ptrbox);
         close(state->in_fd);
         return -1;
     }