If you have something like
commitd65beec32c2626615c08679833982ef6c66f9e3f
authorDan Carpenter <error27@gmail.com>
Fri, 15 Aug 2008 06:56:55 +0000 (15 09:56 +0300)
committerDan Carpenter <error27@gmail.com>
Fri, 15 Aug 2008 06:56:55 +0000 (15 09:56 +0300)
treef0a9bc5cb216c01691404f7c5d3ac22a1d499877
parente69c8d13e63e36e96dc12dbd9f30b6f9e61089a5
If you have something like
if (a) { ... if (a) { ... } }
then leave a as non-null in the second if statement.  (Normally this
happens because of a macro.

Signed-off-by: Dan Carpenter <error27@gmail.com>
check_null_deref.c