timer: handle time going backwards.
[ccan] / test /
drwxr-xr-x   ..
-rw-r--r-- 492 compile_fail-return-value-const.c
-rw-r--r-- 346 compile_fail-return-value.c
-rw-r--r-- 417 run-strings.c
-rw-r--r-- 859 run.c