store States to heap so that State memory adresses stay same

Animal.cpp

@@ -22,6 +22,7 @@ Animal::Animal(string skin) {
     cur = 0;
     viime_event = 0;
     state_changed = false;
+    animation_i = 0;
 
     // set rand seed
     SDL_srand(0);
@@ -31,6 +32,11 @@ Animal::Animal(string skin) {
 }
 
 Animal::~Animal() {
+    for (unsigned i = 0; i < states.size(); i++) {
+        if (states[i]) {
+            delete states[i];
+        }
+    }
 }
 
 SDL_Surface *Animal::readImg(string skin, string state_name, int num) {
@@ -79,6 +85,12 @@ void Animal::readSkin(string skin) {
     State feat;
     char prev_chr;
 
+    for (unsigned i = 0; i < states.size(); i++) {
+        if (states[i]) {
+            delete states[i];
+        }
+    }
+
     states.clear();
     special_states.clear();
     random_states.clear();
@@ -150,11 +162,11 @@ void Animal::readSkinStep(string skin, char chr, string &buf, string &key, State
     prev_chr = chr;
 }
 
-void Animal::readSkinFill(string skin, State feat) {
-    states.push_back(feat);
+void Animal::readSkinFill(string skin, State &feat) {
+    cur_state = new State(feat);
+    states.push_back(cur_state);
 
     // Load images to memory
-    cur_state = &states.back();
     for (int x = 0; x < cur_state->count; x++) {
         cur_state->imgs.push_back(NULL);
         cur_state->imgs[x] = readImg(skin, cur_state->img_name, x);

Animal.h

@@ -30,6 +30,13 @@ class State {
 
     vector<SDL_Surface *> imgs;
     SoundData sound_data;
+    ~State() {
+        for (unsigned i = 0; i < imgs.size(); i++) {
+            if (imgs[i]) {
+                SDL_DestroySurface(imgs[i]);
+            }
+        }
+    }
 };
 
 class Animal {
@@ -40,7 +47,7 @@ class Animal {
     SDL_Surface *readImg(string skin, string state_name, int num);
     void readSkin(string file);
     void readSkinStep(string skin, char chr, string &buf, string &key, State &state, char &prev_chr);
-    void readSkinFill(string skin, State state);
+    void readSkinFill(string skin, State &state);
     void createShape(int num, int w, int h);
     void move();
     void animate(bool reset);
@@ -57,7 +64,7 @@ class Animal {
 
     SDL_Rect disp_pos; // has display width and height and window posiion on it
 
-    vector<State> states;
+    vector<State *> states;
     vector<State *> special_states;
     State *cur_state;
     vector<State *> random_states;