msm: mdss: Validate input argument

MDP kernel function allocates memory using one of the input
parameters. Add sanity check for this input parameter to
ensure proper memory allocation.

Change-Id: Ib7ff3b02e818c0d2a623fb3428fb93cc5bd8e41e
Signed-off-by: Shalabh Jain <shalabhj@codeaurora.org>
1 file changed