diff --git a/gweatherrouting/core/grib.py b/gweatherrouting/core/grib.py
index 5b5b83e..37d1b06 100644
--- a/gweatherrouting/core/grib.py
+++ b/gweatherrouting/core/grib.py
@@ -108,7 +108,7 @@ def getWind (self, tt, bounds):
 		t1 = int (int (round (t)) / 3) * 3
 		t2 = int (int (round (t+6)) / 3) * 3
 
-		if t2 == t1: 
+		if t2 == t1:
 			t1 -= 3
 
 		lon1 = min (bounds[0][1], bounds[1][1])
diff --git a/gweatherrouting/gtk/widgets/mpl.py b/gweatherrouting/gtk/widgets/mpl.py
index 67518f3..bfb6e1c 100644
--- a/gweatherrouting/gtk/widgets/mpl.py
+++ b/gweatherrouting/gtk/widgets/mpl.py
@@ -30,7 +30,7 @@ def __init__(self, parent):
 		self.connect("draw", self.draw)
 
 	def plotDrawer(self, w, h, plt, s):
-		pass
+		return None
 
 	def draw(self, area, ctx):
 		a = self.get_allocation()