adjust weekend logo setting code so that it works on non-mac os x platforms

collects/drracket/private/dock-icon.rkt

@@ -9,14 +9,13 @@
               NSImageView)
 
 (define (set-dock-tile-bitmap bm)
-  (when (eq? (system-type) 'macosx)
-    (unless old-cocoa?
-      (define dock-tile (tell (tell NSApplication sharedApplication) dockTile))
-      (start-atomic)
-      (define view (tell (tell NSImageView alloc) init))
-      (tellv view setImage: (bitmap->image bm))
-      
-      (tellv dock-tile setContentView: view)
-      (tellv dock-tile display)
-      (tellv view release)
-      (end-atomic))))
+  (unless old-cocoa?
+    (define dock-tile (tell (tell NSApplication sharedApplication) dockTile))
+    (start-atomic)
+    (define view (tell (tell NSImageView alloc) init))
+    (tellv view setImage: (bitmap->image bm))
+    
+    (tellv dock-tile setContentView: view)
+    (tellv dock-tile display)
+    (tellv view release)
+    (end-atomic)))

collects/drracket/private/drracket-normal.rkt

@@ -6,11 +6,13 @@
          racket/list
          framework/private/bday
          framework/splash
+         racket/runtime-path
          racket/file
-         "dock-icon.rkt"
          "frame-icon.rkt"
          "eb.rkt")
 
+(define-runtime-path doc-icon.rkt "dock-icon.rkt")
+
 (define files-to-open (command-line #:args filenames filenames))
 
 ;; updates the command-line-arguments with only the files
@@ -95,6 +97,8 @@
 
 (when (eb-bday?) (install-eb))
 
+(define weekend-bitmap-spec (collection-file-path "plt-logo-red-shiny.png" "icons"))
+
 (define normal-bitmap-spec
   (cond
     [(and valentines-day? high-color?)
@@ -110,7 +114,7 @@
     [(and halloween? high-color?)
      (collection-file-path "PLT-pumpkin.png" "icons")]
     [(and high-color? weekend?)
-     (collection-file-path "plt-logo-red-shiny.png" "icons")]
+     weekend-bitmap-spec]
     [high-color?
      (collection-file-path "plt-logo-red-diffuse.png" "icons")]
     [(= (get-display-depth) 1)
@@ -119,8 +123,10 @@
      (collection-file-path "plt-flat.gif" "icons")]))
 (define normal-bitmap (read-bitmap normal-bitmap-spec))
 (set-splash-char-observer drracket-splash-char-observer)
-(when (and high-color? weekend?)
-  (set-dock-tile-bitmap normal-bitmap))
+(when (eq? (system-type) 'macosx)
+  (when (equal? normal-bitmap-spec weekend-bitmap-spec)
+    (define set-doc-tile-bitmap (dynamic-require doc-icon.rkt 'set-dock-tile-bitmap))
+    (set-doc-tile-bitmap normal-bitmap)))
 (start-splash normal-bitmap
               "DrRacket"
               700