window resizable again

git-svn-id: http://svn.net-core.org/repos/t-engine4@790 51575b47-30f0-44d4-a5cc-537603b46e54

src/main.c

@@ -431,7 +431,7 @@ int resizeWindow(int width, int height)
 
 void do_resize(int w, int h, bool fullscreen)
 {
-	int flags = SDL_OPENGL;
+	int flags = SDL_OPENGL | SDL_RESIZABLE;
 
 	if (fullscreen) flags = SDL_OPENGL | SDL_FULLSCREEN;