Bugfixes.

diff --git a/mgmt/models.py b/mgmt/models.py
index 6048b63..dd3a604 100644
--- a/mgmt/models.py
+++ b/mgmt/models.py
@@ -20,7 +20,7 @@ class Object(models.Model):
     return self.name

 class Project(Object):
-  repo = models.CharField(_("Repository"),max_length=64)
+  repo = models.CharField(_("Repository"),null=True,max_length=64)
   git_link = models.CharField(_("Link to Git repo"), max_length=32,null=True)
   admins = models.ManyToManyField(User,related_name='admin_projects',verbose_name=_("Admins"))
   team = models.ManyToManyField(User,related_name='in_projects',verbose_name=_("Team"))
diff --git a/pygit/chart.py b/pygit/chart.py
index 9056317..51bf01d 100644
--- a/pygit/chart.py
+++ b/pygit/chart.py
@@ -58,7 +58,11 @@ class Chart(object):

   def draw(self,lst,color=(0.9,0.2,0.2),place=0):
     pc = self.places[place]
-    pc.set_scale(len(lst)-1,max(lst))
+    if lst:
+      M=max(lst)
+    else:
+      M=1
+    pc.set_scale(len(lst)-1,M)
     pc.cx.new_path()
     pc.cx.set_source_rgb(*color)
     pc.move_to(0,lst[0])
diff --git a/pygit/pygit.py b/pygit/pygit.py
index f13d44f..6b724d9 100644
--- a/pygit/pygit.py
+++ b/pygit/pygit.py
@@ -137,6 +137,8 @@ def group_by_date(lst):
     dt = time.localtime(time.mktime(tp)-time.altzone)
     return time.strftime("%d.%m", dt)
   d = [(c.authored_date, c) for c in lst]
+  if not d:
+    return []
   d.sort()
   d = [(date(e[0]),e[1]) for e in d]
   prev = d[0][0]
diff --git a/pygit/views.py b/pygit/views.py
index 4cad285..6e88fa5 100644
--- a/pygit/views.py
+++ b/pygit/views.py
@@ -47,17 +47,21 @@ def one_repo(request,rid,branch='master'):
   cid = cs[0][0]
   dirs,files = pygit.root_tree(rid,branch)
   dates,n_commits,files_s,lines,inss,dels = cached_stats(rid,branch,cid)
-  print dates
-
-  cht = Chart(900,200,n=2)
-  cht.set_scale(1,len(inss)-1,max(max(inss),max(dels)))
-  cht.draw(n_commits,place=0,color=(0.9,0.9,0.2))
-  cht.draw(files_s,place=0,color=(0.3,0.3,0.3))
-  cht.draw(inss,place=1,color=(0.2,0.2,0.9))
-  cht.draw(dels,place=1,color=(0.9,0.2,0.2))
-#   cht.draw(lines,place=1,color=(0.2,0.9,0.2))
-  cht.labels(dates)
-  chart = cht.finish(cid)
+
+  if inss:
+    cht = Chart(900,200,n=2)
+    mi = max(inss)
+    md = max(dels)
+    cht.set_scale(1,len(inss)-1,max(mi,md))
+    cht.draw(n_commits,place=0,color=(0.9,0.9,0.2))
+    cht.draw(files_s,place=0,color=(0.3,0.3,0.3))
+    cht.draw(inss,place=1,color=(0.2,0.2,0.9))
+    cht.draw(dels,place=1,color=(0.9,0.2,0.2))
+  #   cht.draw(lines,place=1,color=(0.2,0.9,0.2))
+    cht.labels(dates)
+    chart = cht.finish(cid)
+  else:
+    chart = ''

   return render_it('repo.html',
       {'description': dsc,