fix includes

apps/scenery/scenes/ingame.c

@@ -3,6 +3,7 @@
 #include "scene.h"
 
 #include "twn_game_api.h"
+#include "twn_vec.h"
 
 #define STB_PERLIN_IMPLEMENTATION
 #include <stb_perlin.h>

include/twn_util.h

@@ -7,6 +7,7 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include <math.h>
 
 
 /* DON'T FORGET ABOUT DOUBLE EVALUATION */

src/twn_camera.c

@@ -1,5 +1,6 @@
 #include "twn_camera.h"
 #include "twn_config.h"
+#include "twn_vec.h"
 #include "twn_engine_context_c.h"
 
 #include <math.h>