Fix overflow issue

Overflowed constant (INTEGER_OVERFLOW)
overflow_const: Expression *out, which is equal to 3161, where *out * 16 + c - offset is known to be equal to 89,
overflows the type that receives it, an unsigned integer 8 bits wide.

Change-Id: I81fc7a20558c9b78f5c56647ae99c65189e42360
Signed-off-by: Jihoon Kim <jihoon48.kim@samsung.com>