memory leak slowed but still unacceptable

main.scm

@@ -67,7 +67,8 @@
   (foreign-procedure #f "BeginDrawing" () void))
 
 (define end-drawing
-  (foreign-procedure #f "EndDrawing" () void))
+  ; doesn't help, but i'm pretty sure this *is* collect safe
+  (foreign-procedure __collect_safe "EndDrawing" () void))
 
 ; timing
 (define set-target-fps
@@ -172,10 +173,11 @@
 	      (vector2-x b))
 	   (+ (vector2-y a)
 	      (vector2-y b))))
+(define vector2-origin (vector2 0 0))
 
 (define (vector2+ . vs)
   (fold-left vector2+-bin
-	     (vector2 0 0)
+	     vector2-origin
 	     vs))
 
 ; mouse
@@ -584,13 +586,6 @@
     (square-flagged?-set! mouse-square (not (square-flagged? mouse-square))))
   redraw?)
 
-(define (draw-game-squares game skin pos)
-  (game-squares-for-each
-   (lambda (x y)
-     (let ([pos (vector2+ pos (vector2 (* x square-width) (* y square-width)))])
-       (blit-square skin (game-square-type-at game x y) pos)))
-   game))
-
 (define (draw-write obj x y size color)
   (draw-text (with-output-to-string (lambda () (write obj)))
 	     x y size color))
@@ -640,11 +635,19 @@
   (draw-write `(middle released . ,(button-released? 'middle)) 1 90  10 color)
   (draw-write `(right released  . ,(button-released? 'right))  1 100 10 color))
 
+(define (draw-game-squares game skin pos)
+  (game-squares-for-each
+   (lambda (x y)
+     (let ([pos (vector2 (+ (vector2-x pos) (* x square-width))
+			 (+ (vector2-y pos) (* y square-width)))])
+       (blit-square skin (game-square-type-at game x y) pos)))
+   game))
+
 (define (game-draw game skin)
-  (draw-game-squares game skin (vector2 0 0)))
+  (draw-game-squares game skin vector2-origin))
 ; draw-game-over as a separate thing would be nice
 
-; the game shows -99 when you (- num-mines num-flagged) is less than -99
+; the game shows -99 when (- num-mines num-flagged) is less than -99
 (define (run-game mines width height)
   (init-window (* width square-width) (* height square-width) "mineschemer")
   (set-target-fps 60)
@@ -662,7 +665,9 @@
 	    ; this saves a lot of resources
 	    (when (game-tick! game)
 	      ; something leaks memory. huh!
-	      (clear-background BLACK)
+	      ; methinks it's all those foreign vector2s 
+	      ; seems so
+	      ;; (clear-background BLACK)
 	      (game-draw game skin))
 	    #;(draw-mouse-info BLACK)
 	    ))