Hob: Still use initcmd != None as the if judgement

This commit reverts part of change in 491c87d1, since initcmd has a
possible value of 0, therefore we must explicitly compare the initcmd
with None in if judgement.

(From Poky rev: 5736972974a769ea7ce6c92fdf6842db044f770d)

(Bitbake rev: ee55ca82c94080ef825d6de094e38ba40ee62e8b)

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/ui/crumbs/hobeventhandler.py

@@ -119,7 +119,7 @@ class HobHandler(gobject.GObject):
             self.generating = False
 
     def run_next_command(self, initcmd=None):
-        if initcmd:
+        if initcmd != None:
             self.initcmd = initcmd
 
         if self.commands_async:
@@ -127,7 +127,7 @@ class HobHandler(gobject.GObject):
             next_command = self.commands_async.pop(0)
         else:
             self.clear_busy()
-            if self.initcmd:
+            if self.initcmd != None:
                 self.emit("command-succeeded", self.initcmd)
             return