fs/mtd : fix static analysis error
fs/mtd : fix static analysis error

- add exception handling when mtd_read error in smart_find_failure
- initialize local value

Change-Id: Idfd44d15d1864899674a39d73c6fb37b5c66eb6f
Signed-off-by: Heuisam Kwag <2145cbb01e90577cd4983eccc3b7d9a9dfba6875@samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT