[Processing] Improve code readability (follow up 36d1377)

Author: radosuav

python/plugins/processing/core/Processing.py

@@ -343,10 +343,10 @@ def runAlgorithm(algOrName, onFinish, *args, **kwargs):
                 + 'This can cause unexpected results.'
             QgsMessageLog.logMessage(Processing.tr('Warning: Not all input layers use the same CRS.\nThis can cause unexpected results.'), Processing.tr("Processing"))
 
+        # Don't set the wait cursor twice, because then when you
+        # restore it, it will still be a wait cursor.
+        overrideCursor = False
         if iface is not None:
-            # Don't set the wait cursor twice, because then when you
-            # restore it, it will still be a wait cursor.
-            overrideCursor = False
             cursor = QApplication.overrideCursor()
             if cursor is None or cursor == 0:
                 QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
@@ -360,14 +360,15 @@ def runAlgorithm(algOrName, onFinish, *args, **kwargs):
             progress = kwargs["progress"] 
         elif iface is not None :
             progress = MessageBarProgress()
+        
         ret = runalg(alg, progress)
         if ret:
             if onFinish is not None:
                 onFinish(alg, progress)
         else:
             QgsMessageLog.logMessage(Processing.tr("There were errors executing the algorithm."), Processing.tr("Processing"))
 
-        if iface is not None and overrideCursor:
+        if overrideCursor:
             QApplication.restoreOverrideCursor()
         if isinstance(progress, MessageBarProgress):
             progress.close()