staging: dgnc: change style of NULL comparison

Change the NULL comparison style as warned by checkpatch.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sudip Mukherjee 2015-10-03 20:52:44 +05:30 • committed by Greg Kroah-Hartman
commit 60acb623c9