fixed issue 583 (minify error with None)

VERSION

@@ -1 +1 @@
-Version 1.99.4 (2011-12-31 11:47:41) stable
+Version 1.99.4 (2011-12-31 11:54:12) stable

gluon/contrib/minify/minify.py

@@ -43,7 +43,9 @@ def minify(files, path_info, folder, optimize_css, optimize_js,
     - filename (absolute or relative, css or js, actual or temporary) or
     - ('css:inline','...css..')
     - ('js:inline','...js..')    
-    """    
+    """
+    optimize_css = optimize_css or ''
+    optimize_js = optimize_js or ''
     concat_css = 'concat' in optimize_css
     minify_css = 'minify' in optimize_css
     inline_css = 'inline' in optimize_css

gluon/globals.py

@@ -233,12 +233,15 @@ class Response(Storage):
             # cache for 5 minutes by default
             cache = self.cache_includes or (current.cache.ram, 60*5)
             def call_minify():
-                return minify.minify(files,URL('static','temp'),
+                return minify.minify(files,
+                                     URL('static','temp'),
                                      current.request.folder,
-                                     self.optimize_css,self.optimize_js)
+                                     self.optimize_css,
+                                     self.optimize_js)
             if cache:
                 cache_model, time_expire = cache
-                files = cache_model('response.files.minified',call_minify,
+                files = cache_model('response.files.minified',
+                                    call_minify,
                                     time_expire)
             else:
                 files = call_minify()