swupdate-progress: make sure bar array is 0-terminated (buffer overflow)

Created by: tthef

The bar filling was based on the assumption that there are sizeof(bar) - 1 characters, but terminating 0 was never set. The bar array was 60 chars, and the fprintf formatting string expected to find 60 chars, thus printing one garbage char, and the missing 0-terminator was causing the app to crash.

The commit increases the size of bar by 1, and 0-terminates it.

Signed-off-by: Tomas Frydrych tomas@tomtain.com