キャラクタ(主人公、敵)の当たり判定を作成。
<<collision_detection.h>>
gboolean chara_collision_object(mySprite *p, mySprite *o); player対object

void chara_collision_chara(mySprite *p, mySprite *e); player対enemy

gboolean chara_collision_stage(mySprite *c); player対stage