diff -r 624b9694cb0d -r 08e4394ff4fb util/ProcessLogger.py
--- a/util/ProcessLogger.py	Wed Aug 16 15:18:57 2017 +0300
+++ b/util/ProcessLogger.py	Wed Aug 16 16:37:45 2017 +0300
@@ -57,10 +57,12 @@
                 self.retval = self.Proc.returncode
 
             outchunk = self.fd.readline()
-            if self.callback: self.callback(outchunk)
+            if self.callback:
+                self.callback(outchunk)
         while outchunk != '' and not self.killed:
             outchunk = self.fd.readline()
-            if self.callback: self.callback(outchunk)
+            if self.callback:
+                self.callback(outchunk)
         if self.endcallback:
             try:
                 err = self.Proc.wait()