Add missing checks and quotes, remove superfluous checks, etc.
## along with this program. If not, see <http://www.gnu.org/licenses/>.
##
## along with this program. If not, see <http://www.gnu.org/licenses/>.
##
# libsigrok package version number (NOT the same as shared lib version!).
m4_define([libsigrok_major_version], [0])
# libsigrok package version number (NOT the same as shared lib version!).
m4_define([libsigrok_major_version], [0])