}
bullet_type;
-texture_type img_bullet;
-bitmask* bm_bullet;
+extern texture_type img_bullet;
+extern bitmask* bm_bullet;
void create_special_bitmasks();
-texture_type img_golden_herring;
+extern texture_type img_golden_herring;
void upgrade_init(upgrade_type *pupgrade, float x, float y, int kind);
void upgrade_action(upgrade_type *pupgrade);