Update base.py

Add same logic to python3 branch for issue mrworf#182

services/base.py

@@ -182,6 +182,7 @@ def getId(self):
 
     def getImagesTotal(self):
         # return the total number of images provided by this service
+        sum = 0
         if self.needKeywords():
             for keyword in self.getKeywords():
                 if keyword not in self._STATE["_NUM_IMAGES"] or keyword not in self._STATE['_NEXT_SCAN'] \
@@ -190,7 +191,8 @@ def getImagesTotal(self):
                     logging.debug('Keywords either not scanned or we need to scan now')
                     self._getImagesFor(keyword)  # Will make sure to get images
                     self._STATE['_NEXT_SCAN'][keyword] = time.time() + self.REFRESH_DELAY
-        return sum([self._STATE["_NUM_IMAGES"][k] for k in self._STATE["_NUM_IMAGES"]])
+                sum = sum + self._STATE["_NUM_IMAGES"][keyword]
+        return sum
 
     def getImagesSeen(self):
         count = 0