configure & compiler warning cleanups
- configure: Use
LT_INIT
from libtool 2 instead of deprecatedAC_PROG_LIBTOOL
- Add X.Org's standard C warning flags to
AM_CFLAGS
- Fix 20 out of 23
-Wshadow
warnings - Fix 2 of 2
-Wformat
warnings - Fix 40 of 42
-Wformat-nonliteral
warnings - Fix
warning: no previous prototype for ‘sis_get_device’ [-Wmissing-prototypes]
- Fix 5 of 5
-Wstringop-truncation
warnings