[processing] add again the algorithm name after being removed mistakenly in 507aeb0

(cherry-picked from 83502c5)

Author: slarosa

python/plugins/processing/core/Processing.py

@@ -358,7 +358,7 @@ def runAlgorithm(algOrName, onFinish, *args, **kwargs):
         if kwargs is not None and "progress" in kwargs.keys():
             progress = kwargs["progress"]
         elif iface is not None:
-            progress = MessageBarProgress()
+            progress = MessageBarProgress(alg.name)
 
         ret = runalg(alg, progress)
         if ret: