Fix pointer array initialization

Fix pointer array initialization

- Issue:
Buffer overflow can occur when the array is initialized.

- Solution:
This patch uses the zero-initialization for initializing the arrays.
Since C++11, using empty brace sets all value in a array as 0. The
standard names this as zero-initialization. Thus, this patch changes
the initialization using this initialization method.

Change-Id: Ib4362e3db69f2c70cdc16d00ab44303ffbee234b
Signed-off-by: Suyeon Hwang <stom.hwang@samsung.com>