[sextante] fixed delete duplicated geoms algorithm

Author: volaya

python/plugins/sextante/algs/mmqgisx/MMQGISXAlgorithms.py

@@ -105,7 +105,7 @@ def processAlgorithm(self, progress):
 		i = 0
 		cleaned = {}
 		for feature in features:
-			cleaned[feature.geometry()] = feature
+			cleaned[feature.geometry().exportToWkt()] = feature
 			progress.setPercentage(float(i) /featurecount * 50)
 			i += 1
 		i = 0