- [FIX] ui module should only update renderer when it actually changes

- [NEW] Disassembly window now can scroll with cursors or mouse wheel
- [NEW] Added valgrind script and supporting file

ui.cpp

@@ -39,6 +39,7 @@ namespace ui
     void setrenderer(SDL_Renderer *renderer)
     {
         if (!surf) init();
+        if (ren==renderer) return;
         ren = renderer;
         if (tex) SDL_DestroyTexture(tex);
         tex = SDL_CreateTextureFromSurface(ren, surf);